What is a crawler based search engine?

A crawler-based search engine is an online platform that uses automated programs, known as crawlers or Spiders, to browse and index content from websites across the internet. These crawlers systematically navigate the web by following links, gathering data about each page, and storing it in a database. When users perform a search, the search engine retrieves and ranks the indexed content based on relevance, providing users with the most pertinent results. This approach allows search engines to provide comprehensive and up-to-date search results.