Yeah, it's not too helpful, but maybe they have no more data. If you want to know more, go to https://haveibeenpwned.com/ and enter you e-mail. They maybe know, where your data came from.
Otherwise: Do you have a different and random password for each site? If yes, change your gmail password (in as it was gmail itself) and then watch the news, if a site you use was hacked. If you don't have different password for each site... Well then you are gonna have a fun day changing all you passwords to new ones. And use a password manager and a new random password for each site this time, please.
These services are so useless. I have about a million years of free "monitoring" from all the data breeches. Whoever decided a year of useless false-alarms was an adequate remedy for a class-action settlement should be launched into the sun.
Only a nerd would have more than one email address with the same domain.
Reset your email password. It's saying that your email is being sold
No, it's just saying they found whatever the email is along with a password in some dark web database.
The dumb part is that they don't tell you any of the email address in the alert.
It isn't though.
