A web crawler, in Spanish web spider, spider web or web crawler is a computer program which is able to track, go and inspect pages and websites in general, systematically and automatically. It is a kind of widely used web robot today. Its main use is in search engines, but this is not the only use at all. Web spiders can be used in a multitude of tasks, even for illegal purposes, as when they are used with a malicious purpose, and in this case who uses them often resort to technical malicious as the fake or phishing to achieve their goals.
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