Bots visit websites and index the available information and data in the search engine's database. The bots used by search engines serve very useful purposes. If these bots do not visit your site, your site will not be discoverable on existing crawlers. However, in addition to these benevolent bots, some bots can also be used maliciously to circumvent restrictions. For this reason, you may need to take active and evolving protection measures against bots that are constantly renewing and evolving.