Let’s be painfully honest, when your business is not represented on the Internet, it is non-existent to the world. Moreover, if you don't have a website, you are losing an ample opportunity to attract more quality leads. Any business from a corporate giant like Amazon to a one-person company is striving to have a website and content that appeal to their audiences. Discovering you and your company online does not stop there. Behind websites, there is a whole “invisible to the human eye” world where web crawlers play an important role.
https://litslink.com/blog/what-is-a-web-crawler-and-how-does-it-work