Google’s use of alt text as a ranking factor is limited to image search. It does not add value for regular web search.
This is explained by Google’s Search Advocate John Mueller during the Google Search Central SEO office-hours hangout recorded on March 18.
Mueller fields several questions related to alt text, resulting in a number of takeaways about the impact it has on SEO.
Adding alt attributes to images is recommended from an accessibility standpoint, as it’s helpful for visitors…
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