Multi-factor authentication adds a second proof of identity beyond a password: something you have, something you are, or something you know beyond the password itself. It's one of the single most effective controls available, but the method matters more than most people realise.
SMS codes are better than nothing, but they're vulnerable to SIM-swapping and interception. App-based authenticators are a meaningful step up. Hardware security keys and passkeys are stronger again, largely closing off phishing and MFA-fatigue attacks that trick users into approving a login they didn't request.
The practical takeaway for most businesses: enable MFA everywhere you can, prefer app-based or hardware methods over SMS where possible, and make sure staff know that an unexpected MFA prompt is a warning sign to report, not a nuisance to dismiss.
See how goDeep turns thinking like this into training your team will actually remember.