Active Google+ users now have a Mentions tab that displays all the + mentions of a personal profile or page. Earlier the mentions were only accessible in the notification button, which is present at the upper-right hand corner.
Notifications also include +1s, message and other interactions. The new Mentions tab will give an uncluttered view of how a person is being addressed on Google+ and will be found useful especially by managers who want to keep a track of conversations about their page.
For personal profiles, Mentions tab will appear at the top of the page, between More & Explore tabs. Page owners can find the tab after clicking on Steam in the pull-down menu that is on the left side of the page.
Currently, Google+ has not made the feature available for mobile apps.Google+ Gets New Mentions Tab to Display All +Mentions of Page or Profile!,