Launch date: February 24, 2011
Hazards: Duplicate, plagiarized or thin content; user-generated spam; keyword stuffing
How it works: Panda assigns a so-called “quality score” to web pages; this score is then used as a ranking factor. Initially, Panda was a filter rather than part of Google’s ranking algo, but in January 2016, it was officially incorporated into the core algorithm. Panda rollouts have become more frequent, so both penalties and recoveries now happen faster.
How to adjust: Run regular site checks for content duplication, thin content and keyword stuffing. To do that, you’ll need a site crawler, like SEO PowerSuite’s Website Auditor.
To check for instances of external content duplication, use a plagiarism checker like Copyscape.
If you have an e-commerce site and cannot afford to have 100 percent unique content, try to use original images where you can, and utilize user reviews to make product descriptions stand out from the crowd. For more tips on content auditing, jump to this six-step guide.