Algorithms are a set of mathematical calculations and if/then statements that let a computer software decide what action to take. The Google algorithm is a rules-based system that Google employs to sift through hundreds of billions of websites in order to provide relevant results to users’ search queries. On the search engine results page, the results are listed in order of usefulness (SERP). The technology also tailors the results based on your specific circumstances, such as your current location and previous search history.