They are the brains of modern search engines. They allow you to archive web pages and index them in the database of various Google, Bing, and Yahoo!
Google, Bing, Yahoo!, etc. adopt highly refined computer technologies to offer - almost instantly - thousands and thousands of results for every single search made by users. But what makes search engines work possible? Their brain, aka the web crawler spider.
What is a web crawler?
The web crawler sp.........