Google Panda

Google Panda was an algorithm update Google launched in February 2011 to clear low-quality content out of the search results. It hit content farms, thin pages and copied text hardest, and it moved large volumes of traffic from mass-produced article sites to pages with real substance.

Panda judged quality across the whole domain. A site with many weak pages could see even its good pages fall in rankings, which made cleanup a collective exercise: thin content had to be improved, merged or removed before the domain could recover.

As a phenomenon of its own, Panda is history. Google updated the filter through 2015 and folded it into the core algorithm in 2016. The quality assessment did not disappear, it became permanent, and the same logic lives on in Google's core updates and in the helpful content signals that reward content written for people rather than for search engines.

The typical Panda casualty in 2011 was a site with hundreds of short articles produced cheaply to catch search traffic. Generative AI has made that model cheaper than ever, and Google's scaled content abuse policy from 2024 is Panda thinking brought up to date for the AI era. The lesson that carried into modern SEO is the one about individual pages: every page has to justify its own existence, and pages without value of their own pull the domain down with them.