Where does Bing get its search results from?

[seo.gops]

Where does Bing get its search results from?

[laragiles]

Bing automatically crawls the web to build an index of new and updated pages (or URLs) to display as a set of search results relevant to a user-initiated search or action.We design—and continually improve—our algorithms to provide the most relevant and useful results.

[donamiller90]

Bing search results are generated by using an algorithm to match the search query a user enters into the search engine with content in our index. Bing designs - and continually improves - its algorithms to provide the most comprehensive, relevant and useful collection of search results available.