Google says that you can specify a thumbnail image to be shown in search results by adding a <meta name="thumbnail"> tag to the head of the document. See https://support.google.com/programmable-search/answer/1626955?hl=en However, it does not say what kind of urls are accepted in the content attribute. The example on their page is a http: url with no mention of alternatives. Does anybody know if a base64 encoded data url is supported? For...
Originally asked by cipak on Stack Exchange (webmasters) (CC BY-SA 4.0).