Google’s algorithms are a complex system used to retrieve data from the search index and instantly shows the best possible results for a query. The search engine uses a combination of algorithms and numerous classification signals to deliver web pages classified by relevance in their results pages (SERPs).
They are Google Panda, Google Penguin, Google Hummingbird, Google Pigeon, Google Core Algorithm.
1. Google Panda:
- This algorithm introduced in 24th-Feb-2011.
- This algorithm targets the websites which use duplicate content and short content on the website.
- The main purpose of this algorithm is to penalize low-quality content.
2. Google Penguin:
- This algorithm introduced in 24th-Apr-2012
- This algorithm penalizes the websites which have spam search result by buying links, building low-quality links, using link sharing network for link building.
- Keyword Stuffing.
3. Google Hummingbird:
- This algorithm introduced in 22nd-Aug-2013
- Google launched this algorithm to provide instant answers from its own database or from other services.
- This algorithm made the search result very fast and effective.
- Certain websites may lose traffic, as Google will provide instant answers to certain queries.
4. Google Pigeon:
- This algorithm introduced in 24th-July-2014
- The target of this algorithm is to add new signals for ranking local results.
- Google Pigeon affects both map results and local results
- Traditional results are counted in ranking.
- Local review websites got a boost.
5. Core Algorithm:
- In this update, increased the value of keywords in h1 tags by 2%, increased the value of Http by 18%, and decreased the value of a keyword in title tag by 9%.
- Google changed the weight and importance of many classification factors.
6. Google Mobile-Friendly Update:
This algorithm introduced in 21st-April-2015. Used for mobile-friendly pages in mobile search results. It checks your webpages that are not optimized for mobile devices are filtered from the search engine result page and you can also check your website/webpage is mobile friendly with the use of Mobile Friendly Testing Tool.