: Stop reusing passwords. A manager creates unique, complex passwords for every site so that one leak doesn't compromise everything.

: Use legitimate tools to see if your email has been part of a known breach. If it has, change that password immediately.

: Once an attacker successfully "stuffs" a credential, they can change your recovery email, steal personal data, or sell your account on the dark web. How to Protect Yourself

A combo list is a text file filled with credentials harvested from various data breaches across the web. Hackers take these lists and feed them into automated software that tries the credentials on popular sites like Netflix, Spotify, or banking portals. Why the "900k Combo" is Dangerous