G Suite gives the option of turning on two-step verification for Gmail accounts. This provides an extra layer of security to your user’s data by having them authenticate with a verification code as well as their password. It is recommended that you enable this option to make your accounts more secure. The instructions below will lead you through enabling two-step verification as well as enforcing its use for your G Suite service.
Step 01: Go to your Gmail Console and Select Accounts

Step 02: Now Select the Security Option