An algorithm is a set of rules or operations for solving a problem. In web marketing, algorithms are used by search engines to rank search results in an index.
No search engines company will reveal its algorithm. However, we know that Google computes more than 200 signals with 50 variations and Bing 1 000 signals.The number of signals the search engine takes into account does not garantee the quality of the results for a specific query.
A algorithm change may significantly impact the ranking of your website and force you to replicate your search engine optimization (SEO) efforts.