what is difference between web crawler and Bots and spiders

3 ANSWERS

1. Molly
   

   Hay Dude welcome to crime world
   
   Well these three terms are same.....
   Come and enjoye........

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2. Guest8446
   

   A spider, also known as a robot or a crawler, is a program that follows, or "crawls", links throughout the Internet, grabbing content from sites and adding it to search engine indexes.
   
   Dusmant

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3. Guest2846
   

   Spider - a browser like program that downloads web pages.

   
   

   Crawler – a program that automatically follows all of the links on each web page.

   
   

   Robots - An automated computer program that visit websites & perform predefined task. They are guided by search engine algorithms & are able to perform different tasks instead of just one crawling task. They can combine the tasks of crawler & spider together and help in indexing and ranking of websites on any particular search engine.

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