Google Consistently introduce ranking algorithm updates. Some little changes; others truly shake up the SERPs
1. Panda
2. Penguin
3. Hummingbird
4. Pigeon
5. Mobile
6. RankBrain
7. Possum
8. Fred
1. Panda
First Update: February 24, 2011
Hazards: Duplicate Content or plagiarized, keyword stuffing, user generated spam.
How it works: Panda assigns a quality score to web pages
Solution: Remove duplicate content and make high quality content without keyword stuffing and google automatically love your website.
2. Penguin
First Update: April 24, 2012
Hazards: Irrelevant spammy links & over optimization in the anchor text
How it works: Penguin is down websites rank
How to adjust: Do backlinks in relevant websites
3. Hummingbird
First Update: August 22, 2013
Hazards: low-quality content and Keyword stuffing
How it works: Hummingbird helps to interpret search queries & provide results
How to adjust: Do more keyword research and make content for users not for google
4. Pigeon
First Update: July 24, 2014
Hazards: Poor on-page & off-page SEO
How it works: Pigeon affects location based searches its affects rank in local results
How to adjust: Strong your on-page setup (URL, Title, Description, Content, loading speed etc.. ) and Off-page SEO
5. Mobile
First Update: April 21, 2015
Hazards: Lack of mobile responsive website
How it works: Ensure mobile friendly websites to rank at the top of mobile searches
How to adjust: Create mobile friendly focus on usability and speed
6. RankBrain
Launch date: October 26, 2015
Hazards: poor UX, shallow content and Query specific relevance
How it works: It’s a part of hummingbird algorithm and understands query specific search result
How to adjust: Optimize your content with comprehensiveness and relevance
7. Possum
First Update: September 1, 2016
Hazards: Target location Tense competition
How it works: Ensured the local results depends upon searchers location
How to adjust: Expand the Keywords for better Local businesses ranking
8. Fred
First Update : March 8, 2017
Hazards: Thin, ad-centered content or affiliate-heavy
How it works: Targets websites its violate the Google’s webmaster guidelines.
How to adjust: Make changes in thin content and follow the google guidelines and build quality blog content