The days of snooping around your ex girlfriend's profile are about to be taken from you, as Facebook has just announced today the launch of Facebook Groups, which lets people know who has viewed certain items on the social network:
Facebook groups are spaces where you can share things with the people who care about them most. You can use groups to connect with important sets of people like your family, soccer team or book club.

Starting today when you visit a group, you can view who’s seen each post. This way you can stay updated on the group’s activity.

The great news is that Facebook stalking might soon be a thing of the past. So far the new feature only applies to Groups, but we can see this extending to all aspects of the social network.