seo
 

In SEO,What are Spiders, Robos and Crawlers and what are their functions?:confused:

Web crawler is also called web spider which is an automatic indexer. Search engine is having two two major functions:- crawling & building an index.
Automated robots and called spiders or crawlers can reach billions of interconnected documents.

A spider is a program run by a search engine to build a summary of a website’s content (content index). Spiders create a text-based summary of content and an address (URL) for each webpage.