What are Spiders, Robots and Crawlers and what are their functions?

[littlemgrnoida]

Spiders, robot and crawler, they are all same and referred by different names. It is a software program that follows, or “Crawls” different links throughout the internet, and then grabs the content from the sites and adds to the search engine indexes.

[aidpcards]

Spiders, Robots & Crawlers all are different names of the same Google Bot which indexed different information in Google index by crawling one by one every link, page, sitemap etc of a website.

[Carlbrewster]

They all are same, which crawl a website, on a day to day bases and index them in google database.

[deepakrajput]

All above three keyword are same for read the website.

[RH-Calvin]

They are all the same and are different names of a search engine automated program that is responsible to read through webpage source and provide information to search engines. They are helpful to crawl and index webpages in search engines.