Apps Wanting to Set Permissions

Hi all,

I've noticed that when I install an app, it asks for access to change 'Permissions'. What is this? I'm assuming that its allowing the app to access certain data on the phone?

I let the first few apps do it because they seemed to be asking for a couple, but in trying to install UberTwitter, its asking for permission for everything from Location Data, Internet, Phone, Settings, to User Data, Email, Files and Security. There are more too.

Is there any risk or danger in allowing the apps to set these permissions to allow?

If you want the app to work to it full potential then you should allow all.

I figured that, but what does allowing all actually do? What am I giving these apps permission to do on my BB?