On around September 27th, Google launched what’s being called 2.5 of its Panda algorithm. On October 5th, Google’s Matt Cutts tweeted:
“Weather report: expect some Panda-related flux in the next few weeks, but will have less impact than previous updates (~2%).”
Panda-related flux? Indeed, this seems to be the case, with site owners reporting Panda-related changes on at least October 3rd and October 13th. In several cases, I saw sites with Google organic traffic declines on 9/27, recovery on 10/3, and decline again on 10/13.
Read the entire article at Search Engine Land