Reusing or memorising passwords leads to weak, predictable choices — a password manager lets you have a unique, complex password for every account without having to remember any of them.
Passkeys replace passwords entirely with a cryptographic key stored on your device, making phishing and credential theft practically impossible.
Moving your existing passwords into Proton Pass in one go means you're fully protected from day one, with no accounts left behind in less secure places.
Browsers offer far weaker protection for stored passwords than a dedicated password manager, so leaving copies there undermines the security you've just set up.
If your browser keeps offering to save passwords, it's easy to accidentally store new ones there instead of in your password manager. Turning this off keeps everything in one secure place.
Weak or reused passwords are the single most common way accounts get compromised. Replacing them with randomly generated ones closes that vulnerability for good.
Proton Pass:
Even if a password is stolen, MFA means an attacker still can't get in without a second factor that only you have.
Start with the ones with the most sensitive data! (E.g. financial data in accounting software, customer/donor data in CRM, etc.) Where possible, admins are advised to enforce MFA for all users organization-wide via the Admin settings, removing the need for users to change their settings individually.