A great reminder about CT
The format is like FB so if you don't want people to see your private posts, make sure the setting is on "Friends Only"
Reminder: the news feed has a drop down arrow. You can choose to see ALL public posts, or only the posts by people/groups/pages you 'follow.' Conversely, to keep your posts OUT of the public posts, set your profile comments to 'friends only' and post in private groups. (Pages can choose whether or not their posts are visible to everyone or just page folowers.)