What technology do search engines use

Search engines use a variety of technologies to find and index web pages. These technologies include:

Web crawlers: Web crawlers are programs that visit websites and follow links to other websites. This allows the search engine to build a database of web pages.

Indexers: Indexers are programs that store information about the web pages in the search engine's database. This information includes the page's title, description, and the keywords that are used on the page.

Ranking algorithms: Ranking algorithms are used to determine the order in which search results are displayed. These algorithms take into account a variety of factors, including the number of times a page is linked to, the quality of the links, and the relevance of the page to the search query.

User feedback: Search engines also use user feedback to improve their results. This feedback can be used to identify and remove spammy or low-quality websites, and to improve the ranking of high-quality websites.

Search engines are constantly evolving, and new technologies are being developed all the time. These technologies are helping search engines to find, index, and rank web pages more effectively.