If you security is your highest concern, and have a lot of important documents and e-mails on gmail which you would not like to fall into someone else’s hands, or have had spam sent through your gmail account, the new security feature by the gmail team, almost makes it impossible for anyone to hack into your account. It is a two step process to sign in. There will be a new link on your account settings page which looks like this:
Gmail advises to take that step nice and slow, and set it up properly in case you lose you primary phone. Once enabled, it will give an additional page after signing into Google, which asks for the verification code. Gmail can call you with the code or text it to you, or you may generate the code in an app on Android, iOS or Blackberry device.
This way you are pretty sure its only you who is logging in, because though someone else may have your password, your Phone remains with you. Further, if you use Remember Verification for thirty days, you will only have to enter the verification once every month.