Web crawlers are also known as search engine bots, web spiders, or simply bots. These are automated computer programs that systematically browse the internet, following links and indexing web pages to build a database of information. In addition to web crawlers, there are other similar technologies such as web robots, internet bots, and web insects that perform similar functions. These terms are often used interchangeably and can refer to a wide variety of automated programs that access and analyze online content for a variety of purposes. Regardless of the term used, the importance of web crawlers in modern information retrieval cannot be denied, as they are vital tools for both businesses and consumers alike.