Search Engines use a bot or spider to crawl the web to find information matching your query. Although Google is a well-known search engine, keep in mind that no single search engine searches the entire web.
Search engines collect information about your search terms and the sites you visit. This information is then used to customize your search results and the ads you see. If you are concerned about search engines collection private information about you and your searches, the following search engines are considered "private" search engines and do not store cookies or other private information about you and your searches.