Have you been breached?
← Field kitStatistically, yes. The average email address appears in multiple breach dumps, usually from services you forgot you signed up to in 2014. The question is not whether your data leaked, it is which passwords went with it, and whether you still use them.
Found yourself in a breach? The first hour
Change the breached password first, then everywhere you reused it (this is why we don't reuse them, agent). Turn on multi-factor authentication on email and banking before anything else, since email resets every other account. Check the account's forwarding rules and recovery details, attackers plant those as backdoors. Then move every account into a password manager and let it generate something our Interrogation Room would grade A.
One more thing: a wave of "your data was breached, click to secure your account" emails follows every public breach. Those are phish riding the news cycle. Verify on the real site, never via the email. Trained for that? Prove it.