Visit HaveIBeenPwned.com to see if your email address has been involved in any known data breaches.
Files advertised as "account lists" are often disguised malware. Once downloaded, they can install keyloggers on your computer, stealing your bank details and personal info.
Hackers break into a third-party website (like a gaming forum or a smaller e-commerce site) and steal their user database. If those users used the same password for Facebook, their accounts become vulnerable.
If you are worried that your information might be on one of these lists, you should take immediate action to secure your digital footprint: