Authorship works fine with Google+ custom/vanity URLs.
I’ve seen this come up more since custom/vanity URLs for Google+ profiles have become more popular. Authorship works fine with vanity profile URLs, it works fine with the numeric URLs, and it doesn’t matter if you link to your “about” or “posts” page, or even just to the base profile URL. The type of redirect (302 vs 301) also doesn’t matter here. If you want to have a bit of fun, you can even use one of the other Google ccTLDs and link to that.
For more information, please see:
- https://plus.google.com/authorship (archive.org)
- https://support.google.com/webmasters/answer/1408986 (archive.org)
- https://support.google.com/plus/answer/2676340 (archive.org)
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