Search tools are software applications or online services that help users find information on the internet or within specific databases. They work by indexing content and allowing users to enter keywords or phrases to retrieve relevant results. Popular examples of search tools include Google, Bing, and Yahoo. These tools often provide various features, such as filters to narrow down results by date, type, or location. Some search tools also offer advanced search options, enabling users to refine their queries for more precise outcomes. Overall, search tools are essential for efficiently navigating the vast amount of information available online.