What is Panda 3.9???
BTW,
just to clarify a common misconception, Matt Cutts has explicitly
said that they DON"T use Google Analytics data (such as traffic to your
site, time on site, bounce rates, etc.) in their ranking algorithm.
Also, the general sentiment about Panda 3.9 seems mild. Not that many
people are reporting changes, which is a good thing.
Panda 3.9 is the new version of Google's Panda update, which is the update of their ranking algorithm.
In general, Panda is (from Wikipedia):
"aimed at downranking websites that provide poor user experience. To
identify such websites, a machine-learning algorithm by Navneet Panda
was used, hence the name. The algorithm follows the logic by which
Google’s human quality raters determine a website’s quality."
Of course, Google will not tell you how exactly it determines whether your website is good-quality or not.
