A web crawler is software for locating and managing stored web pages. It is used to scan and index the vast amount of content found on the internet, so that users can quickly locate the information they need.
Web crawlers work by automatically following links to web pages. They index the pages they visit, which is then used to create a searchable database. This database is used to provide users with search results when they enter a query into the search engine.
Web crawlers are often used in conjunction with search engines, as they are able to scan the web and collect the relevant information faster than a human can. In addition, web crawlers can be used to gather information for marketing purposes. For example, they can collect email addresses, phone numbers, and other contact information for marketing campaigns.
Web crawlers are also used to detect new webpages, as well as website updates. This allows the search engine to provide more accurate and up-to-date results.
Web crawlers can also be used to detect malware, which can help protect users from malicious websites.
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