Google dues to update its search algorithm several thousand times per year.
Date: February 24, 2011
- plagiarized or thin content;
- user-generated spam;
- keyword stuffing.
How it works: The Panda algorithm update allocates also-called “quality score” to web site. This score is then used as a ranking issue. Firstly, the effects of Panda were slight, but in January 2016 it was always incorporated into Google’s core algorithm. Since then, update rollouts have become more frequent, so both Panda penalties and recoveries now happen faster.
Date: April 24, 2012
- Spammy or irrelevant links;
- links with over-optimized anchor text.
How it works: Google Penguin’s algorithm is to down-rank sites whose backlinks look odd. This update put an end to low-effort link building, like buying links from link farms and PBNs.
Date: August 22, 2013
- Keyword stuffing;
- low-quality content.
How it works: The Hummingbird algorithm helps Google better understand search queries and provide results that match searcher resolved (as opposed to the individual terms within the query). While keywords continue to be important, the Hummingbird algorithm makes it likely for a page to rank query even if it doesn’t contain the exact words the searcher come in. This is achieved with the help of natural language processing that trusts on latent semantic indexing, co-occurring terms and synonyms.
4. Mobile Friendly Updates
Date: April 21, 201
- Lack of a mobile version of the page;
- poor mobile usability.
How it works: Mobile Friendly and subsequent mobile search updates (2018, 2020) have lifted the focus from a desktop to a mobile version of your website. Today, Google ranks all websites based on how fast and user-friendly their mobile versions are.