Refining the Algorithm
2010 – Caffeine (quality not spam)
2011 – Panda (+genuine)
2012 – Venice (+location)
2012 – Penguin (+backlink quality)
2013- Hummingbird (+relevance)
2014 – Pigeon (+local SEO)
2014 – HTTPS/SSL (+encryption)
2015 – 50% of search on mobile
2015 – RankBrain (+AI synonyms)
2016 – Possum (+Brick and Mortar / Small Biz Local Boost)
2018 – Mobile Site Speed Ranking Factor
2018 – Authority & Expertise
2019 – BERT (+ML query intent)
2021 – Core Web Vitals