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What is a dork and how do I correctly use it?

THANKS IN ADVANCE!!

I may be wrong on this, but i think a dork is a website that can be exploited a.k.a hacked by an injector program or by other means. You can google it if you want to learn more.

a dork or a google dork is an input entered in a search engine (preferably google) the results would be websites that are (potentially) vulnerable to sql injection which is a technique used by hackers to exploit a website and gain access to the database.
So the question here is how to exploit sqli vurlnerability rather than how to use dorks...
Hope This Help

google is your friend. you can find a lot of dorks here and in other web.