The Google Play Store is the based application from where you can install or your apps or download music or books. Now it brought up to light a new version,which will get you a summary of all shared activity including all your ratings and +1's.
So in Google Play Store you can check out what your friends have been doing or what they have shared. If your friends like techs and new apps, you will definitively have what to talk to them. If you see their activity, you can bring up to light new subjects in talks.
Another good point of this is that if you are in tech you could easily keep track of your favourite apps, music or books or to keep track of your +1ing apps. So if you don't get all the updates of an app you will surely see it now
So how do you choose your apps? Do you rank them or +1ing them? We sure do it and we like it !