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A web crawler is typically operated by search engines such as Google, Bing, and Yahoo. Web crawlers can receive a search query and apply a search algorithm to search and provide relevant information in response to the search queries by using search engines. Many companies use web crawlers to collect posts and comments on various social media platforms such as Facebook, Twitter and Instagram. Web crawling is used to collect stock prices data from different platforms for different periods (for example 54 weeks, 24 months e.t.c)