Image guidelines for SEO
<img> tag should follow these guidelines for Search Engine Optimization (SEO).
Search engines can interpret and evaluate only text and links; they cannot interpret image files. Search engines use the text in the alt attribute of an
<img> tag as supplementary information for the image file. In addition, alt attribute text is used by audio readers for the visually impaired.
<img> tag in the site to make sure that it contains an alt attribute that has text that is relevant to the image.
<img> tag for the following:
<img>tag should have an alt attribute that contains text.
For more information, see WEB1009 - The <img> or <area> tag does not have an 'alt' attribute with text.
An alt attribute should not start with "copyright," the copyright symbol [© or (c)], or any other character or symbol that has no search-engine relevance.
An alt attribute should contain fewer than 150 characters.
For more information, see WEB1019 - The 'alt' attribute of the <img> or <area> tag contains too many characters.