I was searching a lot regarding
rel=author but got some doubts because most articles are from 2013 and 2014.
First, I understood that Google is not showing author's picture in SERPs since 2014. I also read that it simply ignores the
author link type. From the search engine standpoint I got it, but is the
author link type still used by G+ in any way? I think the answer is no, but would like someone's confirmation.
Second, Google said back in 2014 that authorship was dead but that the
publisher link type was still being used. Is this still valid? I put the
rel=publisher attribute in my page but Google's Structured Data Testing Tool did not show anything about it (seems to be ignored). Again, is this still being used by G+ in any way?
The question can be put as: Shall we still add
rel=publisher to a site? And