{"id":4223,"date":"2020-10-14T14:22:00","date_gmt":"2020-10-14T12:22:00","guid":{"rendered":"https:\/\/help.marketingminer.com\/?post_type=kb&#038;p=4223"},"modified":"2022-10-05T15:23:44","modified_gmt":"2022-10-05T13:23:44","slug":"co-je-alt-text-tag-anebo-seo-pro-obrazky","status":"publish","type":"kb","link":"https:\/\/help.marketingminer.com\/cs\/clanek\/co-je-alt-text-tag-anebo-seo-pro-obrazky\/","title":{"rendered":"Co je ALT text (tag) anebo SEO pro obr\u00e1zky"},"content":{"rendered":"\n<p><strong>Alt text<\/strong> (alternativn\u00ed text) m\u00e1 v\u00edc za\u017eit\u00fdch n\u00e1zv\u016f, jako nap\u0159\u00edklad <strong>alt tag, alt popis<\/strong> nebo <strong>alt atribut<\/strong>. Je to zp\u016fsob, jak\u00fdm dok\u00e1\u017eeme v HTML popsat, co se nach\u00e1z\u00ed na obr\u00e1zku.&nbsp;<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/P\u0159idat-podnadpis-3.png\" alt=\"Definice ALT tagu: ALT text je zp\u016fsob jak\u00fdm dok\u00e1\u017eeme v HTML popsat, co se nach\u00e1z\u00ed na obr\u00e1zku. \" class=\"wp-image-4225\" width=\"400\" height=\"450\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/P\u0159idat-podnadpis-3.png 800w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/P\u0159idat-podnadpis-3-267x300.png 267w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/P\u0159idat-podnadpis-3-768x864.png 768w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Uk\u00e1zka z\u00e1pisu ALT tagu v HTML:&nbsp;<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;img src=\u201cobrazek-alt-tag.jpg\u201d alt=\u201cuk\u00e1zkov\u00fd alt popis obr\u00e1zku\u201d title=\u201ctooltip obr\u00e1zku\u201d&gt;<\/pre>\n\n\n\n<p>V tomto p\u0159\u00edpad\u011b m\u00e1 <strong>alt atribut<\/strong> vypln\u011bnou hodnotu <strong>uk\u00e1zkov\u00fd<\/strong> <strong>alt popis obr\u00e1zku<\/strong>.<\/p>\n\n\n\n<p><strong>Vyzkou\u0161ejte Marketing Miner nyn\u00ed: <\/strong><\/p>\n\n\n\n<iframe loading=\"lazy\" frameborder=\"0\" height=\"250\" src=\"https:\/\/tools.marketingminer.com\/abox\/iframe\/?theme=dark&amp;lang=cs\" width=\"100%\"><\/iframe>\n\n\n\n<h2>ALT vs. Title atribut<\/h2>\n\n\n\n<p>V prvn\u00ed \u0159ad\u011b si mus\u00edme \u0159\u00edct, \u017ee ani jeden z t\u011bchto dvou atribut\u016f <strong>nen\u00ed povinn\u00fd<\/strong> (tak\u017ee ho u obr\u00e1zk\u016f nemus\u00edte vyu\u017e\u00edvat).&nbsp;<\/p>\n\n\n\n<p>Jak si m\u016f\u017eete v\u0161imnout v uk\u00e1zkov\u00e9m zdrojov\u00e9m k\u00f3du v\u00fd\u0161e, tak m\u00e1me vypln\u011bn\u00fd i <strong>alt <\/strong>atribut i <strong>title<\/strong>. V\u011bt\u0161ina lid\u00ed si v\u0161ak plete tyto dva atributy a nev\u00ed, jak\u00fd je mezi nimi rozd\u00edl.&nbsp;<\/p>\n\n\n\n<ul><li><strong>ALT<\/strong> \u2013 popis toho, co se na obr\u00e1zku nach\u00e1z\u00ed (pro zrakov\u011b posti\u017een\u00e9 a pro roboty). V p\u0159\u00edpad\u011b, \u017ee se obr\u00e1zek nena\u010d\u00edt\u00e1, tak se zobraz\u00ed text vypln\u011bn\u00fd v tomto atributu.&nbsp;<\/li><li><strong>Title<\/strong> \u2013 je to textov\u00fd <strong>tooltip<\/strong>, kter\u00fd se zobraz\u00ed po najet\u00ed my\u0161\u00ed na dan\u00fd obr\u00e1zek. U mobiln\u00edch za\u0159\u00edzen\u00ed nem\u00e1 \u017e\u00e1dn\u00e9 vyu\u017eit\u00ed.&nbsp;&nbsp;<\/li><\/ul>\n\n\n\n<p>Rozd\u00edl je velmi p\u011bkn\u011b vid\u011bt na obr\u00e1zku n\u00ed\u017ee, kde vlavo je <strong>ALT text, kter\u00fd se zobrazil po nena\u010dten\u00ed obr\u00e1zku<\/strong>. Vpravo vid\u00edme po najet\u00ed my\u0161\u00ed na obr\u00e1zek, \u017ee se zobrazil <strong>tooltip text zadan\u00fd v title atributu<\/strong>:&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"800\" height=\"400\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/alt-text-vs-title-text.png\" alt=\"ALT text vs Title text (tag)\" class=\"wp-image-4198\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/alt-text-vs-title-text.png 800w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/alt-text-vs-title-text-300x150.png 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/alt-text-vs-title-text-768x384.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Pokud bychom ani jeden atribut nevyplnili, tak by se nic z toho nezobrazilo.&nbsp;<\/p>\n\n\n\n<p>Tento \u010dl\u00e1nek se v\u0161ak bude v\u00edc soust\u0159edit na atribut ALT, tak\u017ee si poj\u010fme napsat n\u011bjak\u00e9 d\u016fvody, pro\u010d je d\u016fle\u017eit\u00e9 ALT text vypl\u0148ovat.&nbsp;<\/p>\n\n\n\n<h2>Pro\u010d je d\u016fle\u017eit\u00e9 ALT text vyplnit<\/h2>\n\n\n\n<p>Toto je 5 nejd\u016fle\u017eit\u011bj\u0161\u00edch bod\u016f, pro\u010d byste m\u011bli vyplnit ALT text u obr\u00e1zk\u016f:<\/p>\n\n\n\n<h3>1. Zlep\u0161uje hodnocen\u00ed v obr\u00e1zkov\u00e9m vyhled\u00e1v\u00e1n\u00ed Google Images<\/h3>\n\n\n\n<p>Podle <a href=\"https:\/\/sparktoro.com\/blog\/less-than-half-of-google-searches-now-result-in-a-click\/\">studie, kterou d\u011blali v 2019 v Sparktoro<\/a> (viz graf n\u00ed\u017ee), je obr\u00e1zkov\u00e9 vyhled\u00e1v\u00e1n\u00ed v Google Images druh\u00fdm nejv\u011bt\u0161\u00edm m\u00edstem, kde lid\u00e9 n\u011bco hledaj\u00ed.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"576\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/search-engine-market-share-q2-2019.png\" alt=\"Pod\u00edl vyhled\u00e1va\u010d\u016f - search engine market share Q2 201\" class=\"wp-image-4201\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/search-engine-market-share-q2-2019.png 1024w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/search-engine-market-share-q2-2019-300x169.png 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/search-engine-market-share-q2-2019-768x432.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Zdroj obr\u00e1zku: <a href=\"https:\/\/images.sparktoro.com\/blog\/wp-content\/uploads\/2019\/08\/search-engine-market-share-q2-2019.png\">https:\/\/images.sparktoro.com\/blog\/wp-content\/uploads\/2019\/08\/search-engine-market-share-q2-2019.png<\/a><\/figcaption><\/figure>\n\n\n\n<p>Podrobn\u00fdm vypln\u011bn\u00edm alt textu se v\u00e1\u0161 obr\u00e1zok m\u016f\u017ee zobrazovat ve vyhled\u00e1v\u00e1n\u00ed Google Images na r\u016fzn\u00e9 long-tail v\u00fdrazy a p\u0159in\u00e9st i <strong>zaj\u00edmavou n\u00e1v\u0161t\u011bvnost<\/strong>.&nbsp;<\/p>\n\n\n\n<p>Jedn\u00e1 se hlavn\u011b o segmenty, kde je pro lidi d\u016fle\u017eit\u00e9 vid\u011bt dan\u00fd produkt je\u0161t\u011b p\u0159ed n\u00e1kupem (nap\u0159. j\u00eddlo, m\u00f3da&#8230;).<\/p>\n\n\n\n<p><strong>Obr\u00e1zkov\u00fd box ve fulltextu<\/strong><\/p>\n\n\n\n<p>Net\u00fdk\u00e1 se to v\u0161ak jen vyhled\u00e1v\u00e1n\u00ed v <a href=\"https:\/\/images.google.com\/\">Google Images<\/a>, proto\u017ee postupn\u011b Google st\u00e1le v\u00edc a v\u00edc tla\u010d\u00ed r\u016fzn\u00e1 <a href=\"https:\/\/help.marketingminer.com\/cs\/clanek\/seznam-rozsireni-serp-na-google\/\">SERP roz\u0161\u00ed\u0159en\u00ed<\/a> do fulltextov\u00e9ho vyhled\u00e1v\u00e1n\u00ed.&nbsp;<\/p>\n\n\n\n<p>Na obr\u00e1zku n\u00ed\u017ee m\u016f\u017eete vid\u011bt, \u017ee po zad\u00e1n\u00ed hled\u00e1n\u00ed e-mail template n\u00e1m to vyhodilo prvn\u00ed organick\u00fd v\u00fdsledek a n\u00e1sledn\u011b roz\u0161\u00ed\u0159en\u00ed <strong>Images box<\/strong> (box s obr\u00e1zky) a a\u017e potom dal\u0161\u00ed organick\u00e9 v\u00fdsledky.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"874\" height=\"947\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/images-box-uk\u00e1\u017eka.png\" alt=\"Uk\u00e1zka images box ve fulltextov\u00e9m vyhled\u00e1v\u00e1n\u00ed\" class=\"wp-image-4204\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/images-box-uk\u00e1\u017eka.png 874w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/images-box-uk\u00e1\u017eka-277x300.png 277w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/images-box-uk\u00e1\u017eka-768x832.png 768w\" sizes=\"(max-width: 874px) 100vw, 874px\" \/><\/figure>\n\n\n\n<p>Bez vypln\u011bn\u00e9ho ALT textu u obr\u00e1zk\u016f byste se do tohoto obr\u00e1zkov\u00e9ho roz\u0161\u00ed\u0159en\u00ed v\u00fdsledk\u016f vyhled\u00e1v\u00e1n\u00ed t\u011b\u017eko dostali a zbyte\u010dn\u011b tak p\u0159i\u0161li o zaj\u00edmav\u00fd zdroj n\u00e1v\u0161t\u011bvnosti na webu.&nbsp;<\/p>\n\n\n\n<p>D\u016fle\u017eitost vypln\u011bn\u00ed ALT textu pro obr\u00e1zkov\u00e9 vyhled\u00e1v\u00e1n\u00ed Google potvrdil i samotn\u00fd John Mu:<\/p>\n\n\n\n<center><blockquote class=\"twitter-tweet\"><p lang=\"en\" dir=\"ltr\">Alt text is extremely helpful for Google Images &#8212; if you want your images to rank there. Even if you use lazy-loading, you know which image will be loaded, so get that information in there as early as possible &amp; test what it renders as.<\/p>\u2014 \ud83c\udf4c John \ud83c\udf4c (@JohnMu) <a href=\"https:\/\/twitter.com\/JohnMu\/status\/1036901608880254976?ref_src=twsrc%5Etfw\">September 4, 2018<\/a><\/blockquote> <script async=\"\" src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/center>\n\n\n\n<h3>2. Zlep\u0161uj\u00ed p\u0159\u00edstupnost pro zrakov\u011b posti\u017een\u00e9<\/h3>\n\n\n\n<p>Na sv\u011bt\u011b jsou miliony lid\u00ed, kte\u0159\u00ed maj\u00ed zrakov\u00e9 posti\u017een\u00ed. V \u010cesku je to kolem <strong>74 000 lid\u00ed<\/strong> (<a href=\"https:\/\/poslepu.cz\/kolik-je-v-ceske-republice-zrakove-postizenych-lidi\/\">\u00fadaj z roku 2018<\/a>). V\u011bt\u0161ina t\u011bchto lid\u00ed pou\u017e\u00edv\u00e1 na \u010dten\u00ed obsahu takzvan\u00e9 <strong>\u010dte\u010dky obrazovky<\/strong>. A tady nast\u00e1v\u00e1 probl\u00e9m.&nbsp;<\/p>\n\n\n\n<p>Pokud nem\u00e1te vypln\u011bn\u00fd alt text, tak \u010dte\u010dky bu\u010f tento obr\u00e1zek <strong>p\u0159esko\u010d\u00ed<\/strong> (v lep\u0161\u00edm p\u0159\u00edpad\u011b), nebo v hor\u0161\u00edm p\u0159\u00edpad\u011b <strong>p\u0159e\u010dtou n\u00e1zev souboru<\/strong>, kter\u00fd je \u010dasto nesmysln\u011b vygenerovan\u00fd jako nap\u0159.<strong> IMG_21646486.jpg<\/strong> -&gt; z tohoto d\u016fvodu je d\u016fle\u017eit\u00e9 tak\u00e9 <strong>pojmenovat soubor n\u011bjak\u00fdm v\u00fdsti\u017en\u00fdm n\u00e1zvem<\/strong>.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Pokud vypln\u00edte alt text, tak ho \u010dte\u010dky up\u0159ednostn\u00ed a p\u0159e\u010dtou ho (nam\u00edsto n\u00e1zvu souboru).<\/p>\n\n\n\n<h3>3. Zlep\u0161uje kontext obsahu<\/h3>\n\n\n\n<p>Aby byl text l\u00e9pe \u010diteln\u00fd, je d\u016fle\u017eit\u00e9 pou\u017e\u00edvat obr\u00e1zky, kter\u00e9 lidi zaujmou. Av\u0161ak pro lep\u0161\u00ed pochopen\u00ed kontextu obsahu vyhled\u00e1va\u010di je d\u016fle\u017eit\u00e9, abyste vyplnili ALT text, kter\u00fd napom\u016f\u017ee vyhled\u00e1va\u010d\u016fm pochopit obsah na str\u00e1nce.&nbsp;<\/p>\n\n\n\n<p>ALT text mus\u00ed b\u00fdt relevantn\u00ed k obsahu (v\u00edc informac\u00ed, jak by m\u011bl vypadat ide\u00e1ln\u011b vypln\u011bn\u00fd ALT text, najdete n\u00ed\u017ee), aby vyhled\u00e1va\u010d pochopil, o co v obsahu (a tak\u00e9 na obr\u00e1zku) jde, a zbyte\u010dn\u011b ho nem\u00e1tl.&nbsp;<\/p>\n\n\n\n<p>Tak\u017ee kdy\u017e m\u00e1me \u010dl\u00e1nek o notebooc\u00edch, tak dopln\u00edme obr\u00e1zek s ALT textem jako nap\u0159. \u201cStylov\u00fd notebook Acer Aspire 5 v modr\u00e9 barv\u011b\u201d a vyhled\u00e1va\u010d hned pochop\u00ed kontext obsahu.&nbsp;<\/p>\n\n\n\n<h3>4. P\u0159i odkazov\u00e1n\u00ed se berou jako anchor text<\/h3>\n\n\n\n<p>Odkazy nemus\u00ed b\u00fdt jen textov\u00e9, ale mohou sm\u011b\u0159ovat i p\u0159es obr\u00e1zky. V p\u0159\u00edpad\u011b, \u017ee odkazujete p\u0159es obr\u00e1zek a m\u00e1te vypln\u011bn\u00fd ALT tag, tak ho vyhled\u00e1va\u010d bere jako <a href=\"https:\/\/help.marketingminer.com\/cs\/clanek\/co-znamena-anchor-text\/\">anchor text<\/a>.<\/p>\n\n\n\n<p>D\u00edky vypln\u011bn\u00ed alternativn\u00edho textu tak pom\u016f\u017eete Googlu l\u00e9pe pochopit, o \u010dem je str\u00e1nka, na kterou odkazujete.&nbsp;<\/p>\n\n\n\n<h3>5. Zobraz\u00ed se p\u0159i nena\u010dten\u00ed obr\u00e1zku<\/h3>\n\n\n\n<p>Jak jsme u\u017e na za\u010d\u00e1tku uv\u00e1d\u011bli (a bylo to vid\u011bt i na obr\u00e1zku), tak v p\u0159\u00edpad\u011b, \u017ee nastane n\u011bjak\u00fd technick\u00fd probl\u00e9m a obr\u00e1zek se ze zdroje nena\u010dte, tak m\u00edsto n\u011bho <strong>se p\u0159ep\u00ed\u0161e na str\u00e1nku ALT text<\/strong>.&nbsp;<\/p>\n\n\n\n<p>V p\u0159\u00edpad\u011b, \u017ee ho nevypln\u00edte, tak se nep\u0159ep\u00ed\u0161e nic.&nbsp;<\/p>\n\n\n\n<h2>Jak zjistit, zda m\u00e1te ALT tag vypln\u011bn\u00fd<\/h2>\n\n\n\n<h3>Ru\u010dn\u00ed kontrola&nbsp;<\/h3>\n\n\n\n<p>Jedn\u00edm z nejrychlej\u0161\u00edch zp\u016fsob\u016f, jak si ov\u011b\u0159it, zda m\u00e1te ALT tag u obr\u00e1zku vypln\u011bn\u00fd pro men\u0161\u00ed po\u010det obr\u00e1zk\u016f, je zkontrolovat p\u0159\u00edmo zdrojov\u00fd k\u00f3d.&nbsp;<\/p>\n\n\n\n<p>P\u0159ejd\u011bte na webovou str\u00e1nku (nap\u0159. \u010dl\u00e1nek) kde se obr\u00e1zek nach\u00e1z\u00ed, a klikn\u011bte na n\u011bj <strong>Prav\u00fdm -&gt; Prozkoumat<\/strong>.&nbsp;<\/p>\n\n\n\n<p>N\u00e1sledn\u011b se v\u00e1m zv\u00fdrazn\u00ed \u010d\u00e1st zdrojov\u00e9ho k\u00f3du, kde se nach\u00e1z\u00ed obr\u00e1zek:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"507\" height=\"66\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-alt-tagu-v-zdrojovom-k\u00f3de.png\" alt=\"Uk\u00e1zka zdrojov\u00e9ho k\u00f3du vyplnen\u00e9ho alt textu\" class=\"wp-image-4207\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-alt-tagu-v-zdrojovom-k\u00f3de.png 507w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-alt-tagu-v-zdrojovom-k\u00f3de-300x39.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><\/figure><\/div>\n\n\n\n<p>V k\u00f3du v\u00fd\u0161e vid\u00edte, \u017ee <strong>alt atribut je vypln\u011bn\u00fd<\/strong> a obsahuje hodnotu: <strong>Canonical \u2013 neindexovateln\u00e9 URL (uk\u00e1zka fungov\u00e1n\u00ed)<\/strong>.<\/p>\n\n\n\n<p>Pokud byste u va\u0161ich obr\u00e1zk\u016f<strong> alt=\u201d\u201d<\/strong> nena\u0161li, znamen\u00e1 to, \u017ee <strong>alt tag chyb\u00ed<\/strong>.<\/p>\n\n\n\n<h3>Marketing Miner \u2013 miner Obsahov\u00e1 anal\u00fdza<\/h3>\n\n\n\n<p>Pokud v\u0161ak pot\u0159ebujete zkontrolovat stovky nebo tis\u00edce obr\u00e1zk\u016f (zda maj\u00ed vypln\u011bn\u00fd ALT), tak by v\u00e1m to ru\u010dn\u011b trvalo velmi dlouho.<\/p>\n\n\n\n<p>P\u0159esn\u011b proto na sc\u00e9nu nastupuj\u00ed automatizovan\u00e9 n\u00e1stroje (tzv. crawle\u0159i), kter\u00e9 v\u00e1m projdou vstupn\u00ed str\u00e1nky, zkontroluj\u00ed obr\u00e1zky a vyp\u00ed\u0161ou, kde nem\u00e1te ALT tag vypln\u011bn\u00fd.<\/p>\n\n\n\n<p>V tomto v\u00e1m m\u016f\u017ee pomoci i Marketing Miner, a to konkr\u00e9tn\u011b <a href=\"https:\/\/help.marketingminer.com\/cs\/clanek\/obsahova-analyza\/\">miner Obsahov\u00e1 anal\u00fdza<\/a>, kter\u00fd v\u00e1m vr\u00e1t\u00ed n\u00e1sleduj\u00edc\u00ed data:&nbsp;<\/p>\n\n\n\n<ul><li><strong>Number of images<\/strong> \u2013 po\u010det obr\u00e1zk\u016f nach\u00e1zej\u00edc\u00edch se na kontrolovan\u00e9 URL&nbsp;<\/li><li><strong>Images without alt text<\/strong> \u2013 po\u010det obr\u00e1zk\u016f, kter\u00e9 nemaj\u00ed vypln\u011bn\u00fd ALT text<\/li><\/ul>\n\n\n\n<h2>Jak napsat dobr\u00fd ALT text<\/h2>\n\n\n\n<p>P\u0159i psan\u00ed ALT textu pamatujte na to, \u017ee je d\u016fle\u017eit\u00fd pro ty, kte\u0159\u00ed obr\u00e1zek nevid\u00ed. Zav\u0159ete si proto o\u010di, spus\u0165te \u010dte\u010dku obrazovky, aby v\u00e1m p\u0159e\u010detla ALT text, a na z\u00e1klade toho si zkuste p\u0159edstavit, co se na obr\u00e1zku nach\u00e1z\u00ed.&nbsp;<\/p>\n\n\n\n<p>Kdy\u017e se va\u0161e p\u0159edstava shoduje s t\u00edm, co se na obr\u00e1zku nach\u00e1z\u00ed, ALT text m\u00e1te vypln\u011bn\u00fd spr\u00e1vn\u011b.&nbsp;<\/p>\n\n\n\n<p>P\u0159i psan\u00ed alternativn\u00edho textu v\u00e1m tak\u00e9 mohou pomoci tyto 4 tipy:<\/p>\n\n\n\n<ul><li><strong>V\u00fdsti\u017enost<\/strong> \u2013 sna\u017ete se v\u00fdsti\u017en\u011b popsat obr\u00e1zek s pou\u017eit\u00edm co nejm\u00e9n\u011b slov. V\u011bt\u0161ina \u010dte\u010dek p\u0159eru\u0161\u00ed popis obr\u00e1zku po 125 znac\u00edch, tak\u017ee toto berte jako horn\u00ed hranici.&nbsp;<\/li><li><strong>Relevance<\/strong> \u2013 aby vyhled\u00e1va\u010d pochopil obr\u00e1zek a jeho relevanci k textov\u00e9mu obsahu, pou\u017eijte v ALT popisu kl\u00ed\u010dov\u00e9 slovo, na kter\u00e9 c\u00edl\u00edte vstupn\u00ed str\u00e1nku (pozor v\u0161ak na spamov\u00e1n\u00ed kl\u00ed\u010dov\u00fdch slov).<\/li><li><strong>Spamov\u00e1n\u00ed kl\u00ed\u010dov\u00fdch slov<\/strong> \u2013 doba p\u0159ecp\u00e1v\u00e1n\u00ed obsahu kl\u00ed\u010dov\u00fdmi slovy je u\u017e za n\u00e1mi. Nefunguje to u\u017e ani v p\u0159\u00edpad\u011b obr\u00e1zk\u016f, tak\u017ee do ALT textu se nesna\u017ete dostat v\u0161echny mo\u017en\u00e9 varianty kl\u00ed\u010dov\u00fdch slov. Nem\u00e1 to \u017e\u00e1dn\u00fd p\u0159\u00ednos a sp\u00ed\u0161e v\u00e1m to m\u016f\u017ee u\u0161kodit.<\/li><li><strong>P\u0159esnost<\/strong> \u2013 popi\u0161te p\u0159esn\u011b to, co se na obr\u00e1zku nach\u00e1z\u00ed, aby to lid\u00e9 pochopili (z\u00e1rove\u0148 se sna\u017ete dodr\u017eovat tak\u00e9 bod \u010d.1 (aby to bylo v\u00fdsti\u017en\u00e9).<\/li><li><strong>Nepou\u017e\u00edvejte \u201eobr\u00e1zek\u201c<\/strong> \u2013 v ALT textu nemus\u00edte ps\u00e1t slovo <strong><em>obr\u00e1zek, na obr\u00e1zku se nach\u00e1z\u00ed<\/em><\/strong> a proto\u017ee vyhled\u00e1va\u010de (i \u010dte\u010dky obrazovky) v\u011bd\u00ed ze samotn\u00e9ho alt tagu, \u017ee popisujete obr\u00e1zek.&nbsp;<\/li><\/ul>\n\n\n\n<h2>Uk\u00e1zky spr\u00e1vn\u00e9ho a nespr\u00e1vn\u00e9ho vypln\u011bn\u00ed ALT tagu<\/h2>\n\n\n\n<p>Poj\u010fme se pod\u00edvat na p\u00e1r obr\u00e1zk\u016f a uk\u00e1zky, jak vypad\u00e1 nespr\u00e1vn\u00e9 a spr\u00e1vn\u00e9 vypln\u011bn\u00ed ALT tagu:&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"580\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu-1024x580.png\" alt=\"Uk\u00e1zka spr\u00e1vneho a nespr\u00e1vneho ALT tagu\" class=\"wp-image-4210\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu-1024x580.png 1024w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu-300x170.png 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu-768x435.png 768w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu-1536x870.png 1536w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-vyplnenia-ALT-tagu.png 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Nespr\u00e1vn\u00fd ALT:<\/strong> &lt;img src=&#8221;IMG_12358.png&#8221; alt=&#8221;cen\u00edk&#8221;&gt; \u2013 m\u00e1lo v\u00fdsti\u017en\u00e9<\/p>\n\n\n\n<p><strong>Nespr\u00e1vn\u00fd ALT: <\/strong>&lt;img src=&#8221;IMG_12358.png&#8221; alt=&#8221;cen\u00edk, tarif, pricing, tarify&#8221;&gt; \u2013 spamov\u00e1n\u00ed kl\u00ed\u010dov\u00fdch slov<\/p>\n\n\n\n<p><strong>Spr\u00e1vn\u00fd ALT:<\/strong> &lt;img src=&#8221;marketing_miner_cenik.png&#8221; alt=&#8221;Cen\u00edk Marketing Miner tarif\u016f&#8221;&gt;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"683\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-a-nespr\u00e1vne-vyplnen\u00e9ho-alt-textu-1024x683.jpg\" alt=\"Uk\u00e1zka spr\u00e1vn\u00e9ho a nespr\u00e1vn\u00e9ho vypln\u011bn\u00ed ALT textu\" class=\"wp-image-4213\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-a-nespr\u00e1vne-vyplnen\u00e9ho-alt-textu-1024x683.jpg 1024w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-a-nespr\u00e1vne-vyplnen\u00e9ho-alt-textu-300x200.jpg 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-a-nespr\u00e1vne-vyplnen\u00e9ho-alt-textu-768x512.jpg 768w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-spr\u00e1vneho-a-nespr\u00e1vne-vyplnen\u00e9ho-alt-textu.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Nespr\u00e1vn\u00fd ALT:<\/strong> &lt;img src=&#8221;torta.png&#8221; alt=&#8221;Torta&#8221;&gt; \u2013 m\u00e1lo v\u00fdsti\u017en\u00e9<\/p>\n\n\n\n<p><strong>Nespr\u00e1vn\u00fd ALT:<\/strong> &lt;img src=&#8221;torta.png&#8221; alt=&#8221;\u010dokol\u00e1dov\u00e1 torta&#8221;&gt; \u2013 m\u00e1lo v\u00fdsti\u017en\u00e9<\/p>\n\n\n\n<p><strong>Spr\u00e1vn\u00fd ALT:<\/strong> &lt;img src=&#8221;torta.png&#8221; alt=&#8221;\u010cokol\u00e1dov\u00fd dort s jahodou na tal\u00ed\u0159ku&#8221;&gt;&nbsp;<\/p>\n\n\n\n<p>V\u00edc se do\u010dtete p\u0159\u00edmo v dokumentaci od Googlu pro obr\u00e1zky: <a href=\"https:\/\/support.google.com\/webmasters\/answer\/114016?hl=cs\">https:\/\/support.google.com\/webmasters\/answer\/114016?hl=cs<\/a>&nbsp;<\/p>\n\n\n\n<h2>Vyhodnocen\u00ed \u00fasp\u011b\u0161nosti v Google Search Console&nbsp;<\/h2>\n\n\n\n<p>Vyhodnocovat \u00fasp\u011b\u0161nost optimalizace obr\u00e1zk\u016f m\u016f\u017eete pomoc\u00ed n\u00e1stroje <a href=\"https:\/\/search.google.com\/search-console\/\">Google Search Console<\/a>.&nbsp;<\/p>\n\n\n\n<p>Po p\u0159ihl\u00e1\u0161en\u00ed se do GSC p\u0159ejd\u011bte vlevo v menu na <strong>V\u00fdkon<\/strong>. N\u00e1sledn\u011b zvolte <em>typ vyhled\u00e1v\u00e1n\u00ed<\/em> na <strong>Obr\u00e1zek<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"498\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/google-search-console-typ-vyh\u013ead\u00e1vania-obr\u00e1zok-1024x498.png\" alt=\"Google Search Console typ vyhled\u00e1van\u00ed - obr\u00e1zek\" class=\"wp-image-4216\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/google-search-console-typ-vyh\u013ead\u00e1vania-obr\u00e1zok-1024x498.png 1024w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/google-search-console-typ-vyh\u013ead\u00e1vania-obr\u00e1zok-300x146.png 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/google-search-console-typ-vyh\u013ead\u00e1vania-obr\u00e1zok-768x373.png 768w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/google-search-console-typ-vyh\u013ead\u00e1vania-obr\u00e1zok.png 1290w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>T\u00edm p\u00e1dem se v\u00e1m budou zobrazovat statistiky v obr\u00e1zkov\u00e9m vyhled\u00e1v\u00e1n\u00ed Google Images.&nbsp;<\/p>\n\n\n\n<p>Uvid\u00edte zde:&nbsp;<\/p>\n\n\n\n<ul><li><strong>Celkov\u00fd po\u010det kliknut\u00ed<\/strong> \u2013 po\u010det proklik\u016f na va\u0161i str\u00e1nku z obr\u00e1zkov\u00e9ho vyhled\u00e1v\u00e1n\u00ed.<\/li><li><strong>Celkov\u00fd po\u010det zobrazen\u00ed<\/strong> \u2013 kolikr\u00e1t se zobrazil v\u00e1\u0161 obr\u00e1zek ve v\u00fdsledc\u00edch vyhled\u00e1v\u00e1n\u00ed.&nbsp;<\/li><li><strong>Pr\u016fm\u011brn\u00e1 m\u00edra prokliku<\/strong> \u2013 procentn\u00ed \u00fadaj (CTR) o tom, kolik procent lid\u00ed z celkov\u00e9ho po\u010dtu zobrazen\u00ed obr\u00e1zku se prokliklo pr\u00e1v\u011b na v\u00e1\u0161 web.&nbsp;<\/li><li><strong>Pr\u016fm\u011brn\u00e1 pozice <\/strong>\u2013 pr\u016fm\u011brn\u00e1 pozice, na kter\u00e9 se zobrazoval v\u00e1\u0161 obr\u00e1zek ve vyhled\u00e1v\u00e1n\u00ed<\/li><\/ul>\n\n\n\n<p>Pod grafem uvid\u00edte i tabulku, kde si to m\u016f\u017eete podrobn\u011b prohl\u00e9dnout pro jednotliv\u00e1 kl\u00ed\u010dov\u00e1 slova nebo str\u00e1nky:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"449\" src=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-v\u00fdkonnosti-obr\u00e1zkov\u00e9ho-vyh\u013ead\u00e1vania-v-GSC-1024x449.png\" alt=\"Statistiky obr\u00e1zkov\u00e9ho vyhled\u00e1v\u00e1n\u00ed v Google Search Console\" class=\"wp-image-4219\" srcset=\"https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-v\u00fdkonnosti-obr\u00e1zkov\u00e9ho-vyh\u013ead\u00e1vania-v-GSC-1024x449.png 1024w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-v\u00fdkonnosti-obr\u00e1zkov\u00e9ho-vyh\u013ead\u00e1vania-v-GSC-300x131.png 300w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-v\u00fdkonnosti-obr\u00e1zkov\u00e9ho-vyh\u013ead\u00e1vania-v-GSC-768x337.png 768w, https:\/\/help.marketingminer.com\/wp-content\/uploads\/2020\/10\/uk\u00e1\u017eka-v\u00fdkonnosti-obr\u00e1zkov\u00e9ho-vyh\u013ead\u00e1vania-v-GSC.png 1175w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2>Z\u00e1v\u011br<\/h2>\n\n\n\n<p>Jak jste se u\u017e v \u010dl\u00e1nku do\u010detli, tak vypl\u0148ovat ALT text je opravdu velmi d\u016fle\u017eit\u00e9. Pokud naraz\u00edte na to, \u017ee v\u011bt\u0161inu alternativn\u00edho textu nem\u00e1te vypln\u011bnou, je t\u0159eba si ud\u011blat prioritu.&nbsp;<\/p>\n\n\n\n<p>J\u00e1 doporu\u010duji proj\u00edt podle Google Analytics nejd\u016fle\u017eit\u011bj\u0161\u00ed vstupn\u00ed str\u00e1nky, kter\u00e9 v\u00e1m p\u0159in\u00e1\u0161ej\u00ed nejv\u011bt\u0161\u00ed n\u00e1v\u0161t\u011bvnost a zam\u011b\u0159it se v nich na optimalizov\u00e1n\u00ed ALT popis\u016f pro obr\u00e1zky.&nbsp;<\/p>\n\n\n\n<p>Va\u0161e \u00fapravy si potom m\u016f\u017eete vyhodnocovat podle n\u00e1vodu v\u00fd\u0161e v Google Search Console.&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alt text (alternativn&iacute; text) m&aacute; v&iacute;c za&#382;it&yacute;ch n&aacute;zv&#367;, jako nap&#345;&iacute;klad alt tag, alt popis nebo alt atribut. Je to zp&#367;sob, jak&yacute;m dok&aacute;&#382;eme v HTML popsat, co se nach&aacute;z&iacute; na obr&aacute;zku.&nbsp; Uk&aacute;zka z&aacute;pisu ALT tagu v HTML:&nbsp; &lt;img src=&ldquo;obrazek-alt-tag.jpg&rdquo; alt=&ldquo;uk&aacute;zkov&yacute; alt popis obr&aacute;zku&rdquo; title=&ldquo;tooltip obr&aacute;zku&rdquo;&gt; V tomto p&#345;&iacute;pad&#283; m&aacute; alt atribut vypln&#283;nou hodnotu uk&aacute;zkov&yacute; alt popis &#8230; <a title=\"Co je ALT text (tag) anebo SEO pro obr\u00e1zky\" class=\"read-more\" href=\"https:\/\/help.marketingminer.com\/cs\/clanek\/co-je-alt-text-tag-anebo-seo-pro-obrazky\/\" aria-label=\"V\u00edce na Co je ALT text (tag) anebo SEO pro obr\u00e1zky\">\u010c\u00edst d\u00e1l<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":[],"kbtopic":[39],"kbtag":[81,80,77],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Co je ALT text (tag) anebo SEO pro obr\u00e1zky - Marketing Miner Knowledge Base<\/title>\n<meta name=\"description\" content=\"Alt text (alternativn\u00ed text) m\u00e1 v\u00edc za\u017eit\u00fdch n\u00e1zv\u016f, jako nap\u0159\u00edklad alt tag, alt popis nebo alt atribut. 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