Panda update is an algorithm designed to reduce rankings for low-quality sites:
- sites that copy content from other websites or
- sites that are just not very useful or
- sites with poor user experience
Here is the answer to all your Panda problems:
http://www.keywordcountry.com/blog/goog ... da-update/Since the main update (in February and April), Google has been pushing small updates to the Panda filter all of which aim to improve Google search quality.
- Panda Update 2.1: May 10, 2011
- Panda Update 2.2: June 16, 2011
- Panda Update 2.3: July 23, 2011 and more...