If something goes up on the Internet, eventually someone is going to find it. But that doesn't mean you have to make it easy for them. There are certain things a Google+ page may want to say or share that isn't intended for all audiences. So Google has rolled out a few features that let people restrict who can see content based on age and country.
For clarification, these limitations apply to Google+ pages, such as the Android Police page, instead of individual profiles.