Google says it will roll out the latest update to its Panda algorithm later tonight.
The company posted the news a few minutes ago on Twitter, saying this update will affect about one percent of search results.
New data refresh of Panda starts rolling out tonight. ~1% of search results change enough to notice. More context: goo.gl/huekf
— A Googler (@google) July 24, 2012
By our count, this is Panda Update 3.9. The previous update, 3.8, occurred just about a month ago — on June 25th.
Panda rolled out initially in February 2011 and was designed to remove low-quality/thin content from Google’s search results.
For more background on the Panda algorithm, see our Panda Update News archive.