What do you understand by Spider?

A Web crawler is an Internet bot that routinely browses the World Wide Web, often with the goal of Web indexing. It is also -+known as a spider or spiderbot (web spidering).

1: an animal without wings that resembles an insect but has eight legs instead of six and a body divided into two rather than three. This animal frequently spins silk threads into webs to catch prey. 2: a skillet made of cast iron. spider, n.