Update (Florida) The so-called “Florida” update targeting web spam was the first major update coming from Google that put the kibosh on tactics used in previous years to manipulate rankings. Learn more: What happened to My Site on Google? A Note on company employee list Algorithm Changes Before "Florida" Between 2000 and 2003, PageRank was generally updated monthly and rankings fluctuated. Webmasters often published their findings on Webmaster World (before the days of Google confirmations or announcements).
Read more: A brief history of SEO Panda Algorithm Update Panda was launched in February 2011, with the aim of putting more emphasis on quality content. The update reduced the amount of thin and inexpert material in search results. The Panda Filter company employee list specifically targeted content produced by so-called “content farms”. With Panda, Google also introduced a quality rating for pages which has become a ranking factor. This classification took its structure from human-generated quality ratings (as documented in its Guidelines for the Research Quality Assessor).
Websites that dropped in the SERPs after each iteration of Panda were forced to improve their content in order to recover. Panda was added to Google's company employee list core algorithm in January 2016. Panda Update History From 2011 to 2016, Panda went through many refreshes and data updates before being integrated into the core algorithm. Core Algorithm Integration -