If you have had an IT conversation in the last few years, someone has probably told you to enable multi-factor authentication. Maybe you did. Maybe you nodded and moved on. Here is what it actually is and why it matters as much as people say.
A password is something you know. The problem is that passwords can be stolen through phishing, data breaches at websites you use, malware, or sometimes just through guessing. Once an attacker has your password, nothing stops them from logging in as you.
Multi-factor authentication adds a second requirement: something you have, specifically your phone.
You enter your password as usual. Then the system asks for something else. This usually looks like one of three things.
A six-digit code from an app on your phone (Microsoft Authenticator and Google Authenticator are both free) that changes every 30 seconds. You type it in after your password. Or a push notification that asks "Is this you trying to log in?" that you tap to approve. Or a code sent to your phone by text message.
The authenticator app approach is the most secure. Text message codes work too and are still much better than nothing.
Even if an attacker has your password, they cannot log in without your phone in their hand. That stops most account takeovers entirely.
Microsoft's own data shows that MFA blocks over 99.9% of automated account compromise attacks. It is the single highest-impact security change most small businesses can make, and it costs nothing to enable.
At minimum: your business email, your banking and financial accounts, any remote access tools, payroll software, and cloud storage. If you use a password manager, protect that with MFA too.
The main pushback is that it adds a step to logging in. That is true, and it adds about five seconds. Those five seconds have prevented more business account takeovers than any other security measure available.
In Microsoft 365 and Google Workspace, administrators can require MFA for all users so no one can skip it. We recommend enforcing it rather than making it optional.
If you need help rolling out MFA across your team, it is one of the quickest wins in business security. We can usually get a small team set up in an afternoon. Reach out and we will get it done.