When a user enables Two-Factor Authentication (2FA) on their Coinbase account, they are prompted to generate a set of backup codes, also known as recovery codes. These codes serve as a failsafe in case the user loses access to their 2FA method, such as a phone or authenticator app. The "keys.coinbase.com/activate" URL is used to activate these backup codes.

First, a quick clarification: Instead, this phrase refers to a process where Coinbase asks you to use a recovery key or device verification key to activate a new device, browser, or authenticator app.

By following these steps and troubleshooting tips, you should be able to successfully activate your Coinbase account using the coinbase.com/activate link.

That’s why saving those keys offline (paper, fireproof safe, password manager backup) is so critical.