Each part of this "write-up" style advertisement describes the quality and quantity of the stolen data: Learn more about Password Combo List notification
Run "Business Email Compromise" (BEC) scams against your contacts. How to Protect Yourself
Sophisticated email campaigns trick users into entering their login details on fake websites.
Gmail, Outlook, and Yahoo allow you to see recent logins by IP and device. Revoke unknown sessions.
Even if a hacker has your "valid" email and password, they cannot log in without the secondary code from your phone or an authenticator app.
: Many combo lists are derived from data breaches of services or websites. Users often reuse passwords across multiple sites, which can lead to a significant increase in the potential for unauthorized account access when such lists are circulated.
Tricking users into entering their login details on a fake website.