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What are Web Crawlers and how do they work?

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Zinavo Offline referral

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#1
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What are Web Crawlers and how do they work?
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They are bots that go through websites to index them for SERP
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Googlebot is the webcrawler used by Google. It is used by Google to find and retrieve webpages. The information gathered by Googlebot is used to update the Google index.
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A web crawler also known as a web-spider is an internet software or bot that browses the internet by visiting different pages of many websites. The web crawler retrieves various information from those web pages and stores them in its records. These crawlers are mostly used to gather content from websites to improve searches in a search engine.
How do they work ?
A Web-Crawler is an automated script which means all of its actions are predefined. A Crawler first begins with an initial list of URLs to visit, these URLs are called seeds. Then it identifies all the hyperlinks to other pages that are listed on the initial seed page. The web crawler then saves these web pages in form of HTML documents which are later worked upon by the search engine and an index is created.
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crawlers crawl the whole pages and cache the webpages with in week
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Web crawler is used by search engine to find what is new on the website.
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web crawlers are typically used to track backlinks and crawl web pages. there are few famous crawlers
google bot
bing bot
yahoo bot
ahrefs bot
etc..
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A Website Crawler used by search engines to search the web for information for indexing.
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A crawler is a program that visits Web sites and reads their pages and other information in order to create entries for a search engine index. The major search engines on the Web all have such a program, which is also known as a "spider" or a "bot."



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