Two-Step Verification of an Apple ID is an additional security measure that helps protect an account better. It will ask you to verify your identity using any of your Apple devices in order to be able to manage the account that belongs to you. It is also required to make purchases in the App Store or iTunes.
Steps
Step 1. Visit the Apple ID website
Open any browser and type https://appleid.apple.com/. Press "Enter" on your keyboard to access the site.
Step 2. Log into your Apple account
Enter your Apple ID and password in the indicated fields and press "Enter" on your keyboard to enter.
Step 3. Access the password and security settings
Select "Password & Security" on the left side of the screen.
Step 4. Answer the security question associated with your account
Just answer the question in the field shown on the right. Then, click on "Continue". This will open the verification page.
Step 5. Verify your account
Click "Get Started" on the verification page. On the next page, click on "Continue".
Step 6. Wait for the four-digit code to arrive
A four-digit code will be sent to your iOS device. Write it down.
Step 7. Enter the four-digit code
The next time you log into your account, all you have to do is enter the four-digit code that was sent to your iOS device. Follow this procedure to complete the verification process.