The other week we reported that Google doesn't support real canonical for image search. But Google's John Mueller clarified this morning that they do support it for PDFs in web search. He also added, they do not support it for images in image search specifically.
Someone said John offered conflicting advice, which triggered John's response:
@AndreDeMarre We don't use rel=canonical for images in Image Search. We do use it for PDFs in web-search though.
— John Mueller (@JohnMu) August 23, 2016
John said it again:
(1) We don't use rel=canonical for images in Image Search.
(2) We do use it for PDFs in web-search though.
So he seems confident with his answer.
Forum discussion at Twitter.
