Signing in with 2-step verification for Google is a way to protect the privacy and security of your account by using both your password and your phone.

Sign in to your Google account -

Click on your initial in the top right and then click Manage my account:

Click Security:

Click 2-Step Verification:

Click Get Started:

Enter a mobile phone number and select Text Message or Phone call and click Next:

Alternativley you can select more options to view the other methods available.

Enter the code received and click Next:

Click Turn On to complete:

When a new sign in is detected on a new device (laptop, phone, tablet etc). You will need to verify the login with your password and a random security code which is sent to the phone number entered above.