Verify your Google account

When you set up a Google account with a non-Google email, we’ll send a verification code to the email address you used to create the account. If you don’t verify your address, you won’t be able to create a Google account.

Login to your email to verify your account
While you’re creating your account, you’ll receive an email from Google. Open the email and find the verification code.
To finish creating your account, enter the verification code when prompted.
To see if your account is verified, sign in to your Google account. If you haven’t been verified yet, you’ll see a message asking you to verify your account.
https://www.wikicue.com/google-could-not-verify-this-account-belong-to-me/