Apr 7, 2011
About Google Panda - The Recent Google Change
Google Panda Update is an algorithm that designed to reduce rankings for low-quality sites (not eliminate them, as there are plenty of scraper sites still populating the SERPs).
Want to learn more about the Panda Update, please read these articles:
Google Panda Update Tip: Remove Low-Quality Content
Google's Farmer/Panda Update: Analysis of Winners vs. Losers
Google Panda update survival guide
How to Beat Google’s 2011 Panda Update
Google Algorithm Change February 2011 Losers & Winners
Google Farmer Update: Quest for Quality
Google’s Panda Update Changed The Playing Field