When a query is made in a search engine, the search engine sends what are called “crawlers” to gather information about that query from content found on the internet. The crawlers then build an index with said information, which is fed through an algorithm to match the index with your query. The algorithm is based on a number of matrices, such as exact-match keyword and page-level content and link features. The output of the algorithm is an index of only the most relevant links to the querent’s search. These relevant links are what appear on the results page after a query is submitted.