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What is Crawling?

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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." Crawlers are typically programmed to visit sites that have been submitted by their owners as new or updated. Entire sites or specific pages can be selectively visited and indexed. Crawlers apparently gained the name because they crawl through a site a page at a time, following the links to other pages on the site until all pages have been read.

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    When search engine bots comes to your website to read it. than They crawl it to index.

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    In the context of SEO, ‘crawling’ basically refers to a robot which is automatically surfing the web, categorizing and analyzing each site it encounters.

    There are two main types of such programs in SEO. The first one is the crawlers used by the main search engines, such as Google, Bing or Yandex. The second type is private commercial crawlers, used, for example, by SEO toolsets to establish and maintain fresh index of links and backlinks on the internet.

    That may sound impressive, but actually, such speeds is the only way to keep the head out of the water. The internet has so many pages, that even when we crawl 200 million of them in 60 minutes, people often complain about updates in our index.

    Obviously, Google’s bot is more powerful and can surf the internet faster. But if there’s one thing to know about crawling, it’s that no one in the world at any given moment has a complete picture of the internet. It’s too big!

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    Crawling is a process by which search engines crawler/ spiders/bots scan a website and collect details about each page: titles, images, keywords, other linked pages, etc. It also discovers updated content on the web, such as new sites or pages, changes to existing sites, and dead links.

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