Quick meaning
A security step that asks you to prove who you are in two ways — usually your password plus a code sent to your phone. It makes your accounts much harder to break into.
Think of it like this
Like needing both your door key and a secret knock to get inside your home.
Where you may see this
You may see this in login screens, warning messages, banking apps, or scam-prevention advice.
Why it matters
Understanding this word helps you protect your money, personal information, and online accounts.
Say it simply
Two-Factor Authentication (2FA) means: A security step that asks you to prove who you are in two ways — usually your password plus a code sent to your phone. It makes your accounts much harder to break into.