Facebook is updating new features to make it easier for people to share their updates selectively and to make distinctions among friends, family members and co-workers on the social network rader.

The changes are intended at making it easier to sort Facebook friendships into separate clusters, such as college chums, co-workers, neighbors and family. It’s aimed to make people more comfortable about posting observations and pictures for which they want only a limited audience.

Facebook already offers this through a “lists” feature, but only about 5% of 500 million plus users use that.

The new feature is known as “groups“. It will enable people to set up pages consisting of people who share the same interests.

Facebook founder and CEO said it would bring a “fundamental shift” in how people use Facebook.