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What is two-factor authentication and why you should use it

Two-factor authentication (2FA) adds a second layer of security to your accounts. Even if someone guesses your password, they still can't access your account without the second factor — a code from your phone. It's like having a lock and key plus a security guard.

2FA requires two separate pieces of proof before you can access your account. Common methods include SMS text codes, authenticator apps like Google Authenticator, biometric (fingerprint or face), or backup codes. Each method has tradeoffs between security and convenience.

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