1. Panda Launch date: February 24, 2011 Hazards: Duplicate, plagiarized or thin content; user-generated spam; keyword stuffing 2. Penguin Launch date: April 24, 2012 Hazards: Spammy or irrelevant links; links with over-optimized anchor text 3.Pirate Launched: Aug 2012 Rollouts: Oct 2014 Goal: De-rank sites with copyright infringement reports 4. Hummingbird Launch date: August 22, 2013 Hazards: Keyword stuffing; low-quality content 5. Pigeon Launch date: July 24, 2014 (US); December 22, 2014 (UK, Canada, Australia) Hazards: Poor on- and off-page SEO 6. Mobile Launch date: April 21, 2015 Hazards: Lack of a mobile version of the page; poor mobile usability 7. RankBrain Launch date: October 26, 2015 Hazards: Lack of query-specific relevance features; shallow content; poor UX 8. Possum Launch date: September 1, 2016 Hazards: Tense competition in your target location 9. Fred Launch date: March 8, 2017 Hazards: Thin, affiliate-heavy or ad-centered content ...