What is a Crawler?

A crawler, also known as a web crawler or spider, is a type of software used by search engines to browse and index web pages on the internet. Its main job is to visit websites, read the content, and collect information to build an index of that content for search engines to use when serving relevant search results.

The crawler follows links from one page to another, gathering data about the content, structure, and other important factors of each page. This data helps search engines understand what a webpage is about so they can rank it appropriately in search engine results. Crawlers help ensure that search engines have up-to-date information and can provide accurate, relevant search results to users.