Google began to allow users to separate their AdWords campaigns on smartphones from their PC campaigns.
As a great help to digital marketing services, now it is also possible to target the tablets for an AdWords campaign. This option of Tablet Targeting gives you more precise control to effectively reach the growing number of tablet users.
You can see the settings below.
This will help us to measure actually how many users are clicking on Google+ button through Google Webmaster Tools and Google Analytics.