There are three types of Hackers and they are “White Hat”, “Black Hat”, & “Grey Hat” Hackers. A Hacker basically is a person who accesses the computer network and systems without the proper authorization to steal sensitive information or for other economic purposes. So, a White Hat Hacker is a good hacker out of these 3 types. They are also referred to as an Ethical Hacker, who works with organizations to help them validate their security vulnerabilities and fix them to avoid any kind of loophole misuse by other hackers.
A Black Hat Hacker is a bad guy here out of all these 3 types. These hackers are the bad guys who are cybercriminals that steal information and other unauthorized data for personal or economic gains. And then there are Grey Hat Hackers who are kind of mix of both White and Black Hat, who try both these types. If you wish to become a certified white-hat hacker or an Ethical hacker, then you must clear the CEH exam. And for that, I would recommend you to enroll in a good Ethical Hacking course. And in case, if you are a beginner, then start off by watching our video on How To Become An Ethical Hacker.