Two-factor authentication will help make your Google account more secure, as it will require the extra code sent to your phone or authentication app to log in.
1. Go to the Google 2 step authentication web page
2. On the bottom right, select the GET STARTED button
4. Enter the verification code that Google sent to your phone, and select next
5. You maybe asked to log in again to make sure it is you requesting the 2FA.
6. Select the Turn On in the bottom left
7. A message will show saying the 2-Step Verification is ON