web crawling

Web crawling is the automated process of systematically browsing the internet to collect and index information from websites. Search engines like Google use web crawlers, also known as spiders or bots, to discover new pages and update existing content. The crawler follows links from one page to another, gathering data such as text, images, and metadata. This information is then organized and stored in a huge database, helping users find relevant results when they search online. Essentially, web crawling ensures that search engines have the most current and comprehensive information available for users.