guggi2000 - 4:40 pm on Jun 10, 2013 (gmt 0)
I added the author tag in March... my picture did not appear in the SERPs.
On April 20 I found out, that the "Contributions" in G-Plus needs to be "public". On April 24 I lost 50% of the traffic of the articles. CTR went down, SERPS went down, changing picture did not help, Nothing...
Yesterday, I changed the G-Plus "Contribution" to "Private" again.
Guess what: the traffic to the articles are back to normal, within a day.
Do I use Google Plus? Yes, but I post articles only to my followers (private circles), and travel images to the public... I guess that is not enough for G.