What is a "cyberbot" or "spider"?

What is a "cyberbot" or "spider"?

Ethan Feerst and Dylan Stewart (Technology Therapist, Mac Guru) gives expert video advice on: What is a "search engine"?; What is the difference between "upload" and "download"?; What is "spam"? and more...

Spiders crawl around: they crawl around the Internet, and they have many tendrils and many legs. They go out, they touch and index and take a look at different kinds of information, and feed them back into a central place, and essentially pull them back into the World Wide Web so that they're easily indexed and accessible by you, by somebody searching for them.