Critics have increasingly complained about algorithms enabling online-search and social-media companies to determine the content users see, with some on the right claiming the result is a form of censorship because certain views may be excluded. The big internet firms generally have denied such claims and contend that using profile information gives users better-tailored results.
https://www.wsj.com/articles/legislation-would-require-search-engines-to-disclose-algorithms-11572540266