To sign in to Coinbase, your cryptocurrency exchange account, open the Coinbase app on your mobile device or visit the Coinbase website in your web browser. You'll need to enter your registered email address and your password in the provided fields. For enhanced security, Coinbase often requires a 2-step verification (2FA) code, which will be sent to your phone via SMS or generated by an authenticator app. Enter this code to complete the process. After successful verification, you'll gain access to your Coinbase dashboard to manage your cryptocurrency portfolio.