Password managers are a great way to help reinforce the strength of your account security. Password managers make it not only much more reasonable to have a unique login for every site or application you have credentials for, but you can also make the passwords very long and random (e.g. you can have passwords that look like “e82X@c4!$Gsk101#S3ndu8(38s”, which is 26 characters long, completely random, and practically impossible for an attacker to guess).
Password managers ensure that you never have to remember these passwords, which also makes rotating them easier as well. Remember just one strong passphrase to authenticate to your password manager (and enable MFA!) and let the password manager take care of the rest for you.