How to set up two step authentication in Gmail?

[Alanmax]

If you need to get the two-step authentication in Gmail done, then in that case the user should get the ownership of the account verified through the alternate email ID or the registered mobile number. If needed then the user can read more regarding this procedure.

[mariahcarey]

Set 2-Step Verification on.
+ Create a Google account.
+ Select Security from the navigation menu. wordle
+ Select 2-Step Verification under "Signing in to Google." Start now.
+ Take the steps shown on the screen.