Google publicly present latest characteristic in Gmail email service, able of warning users about doubtful account of user. Earlier, Google applied the form shown last time operation of account information and warnings when account was accessed from various place at bottom of inbox. Though, as said by Will Cathcart, charge of products in Gmail, users rarely check this information.

So, Google determined to step away from show this warning in big banner with complete information about place of user account accessed illegally. If user has habit of checking mailbox as you are at "home" when unexpectedly see access records from other countries, surely much in question. Also, as said by Google, if system detects certain IP address attempting to access many Gmail account and then change password, system will broadcast warning information for accounts are violated. After getting warning, user can click "Details" for more information, like where access to latest. The user is better to change the password to login.