Turning on 2-factor protects your accounts by adding a second step to log in. It's easy for you to use, but makes it hard for anyone else to use your identity or get your data.
2-factor protects your accounts
You've probably got important information in online accounts: things like email, online banking, and social media. You can protect those accounts by turning on 2-factor authentication. This adds an extra check when you log in. Logging in with 2-factor is easy for you, but the extra check makes it much harder for other people to access your account.
How to set it up
The most common way to use 2-factor authentication is with an app on a smartphone. When you turn on 2-factor for an online account or service, apps like Google Authenticator or Authy can generate secret codes that only exist on your device.
To get these codes on your phone, you need to set up each online account with 2-factor. This normally involves getting a unique QR code from your account settings, and scanning this into the authenticator app you want to use.
Where to learn more
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CERTNZ are New Zealand's official experts on computer security. They are the first and best place to get security advice, or report issues. They offer advice on 2FA, and links to turn it on for many popular services.
Wondering which services offer 2-factor protection for your data? Twofactorauth.org has a list of services. The list is not complete, but the website offers tools to add services, and to demand 2-factor protection from services which do not yet offer it.