Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
The company I work for forces everyone to do a training every year that goes over all of that and a few others. I assume most larger companies do the same.
None of this has anything to do with password managers, but knowing how to install stuff properly.