NEW YORK -- Facebook is starting to organize users' friends into smaller groups to make it easier to share photos, posts and links. Facebook has long allowed users to group their friends into categories, but most people have not used those capabilities.

Beginning today, Facebook will automatically group many of your friends based on whether they live near you, went to your school or work with you. Then you can read posts or share updates with specific groups instead of dozens, or hundreds, of "friends" at a time. Called "smart lists," the feature is optional to use.