What can people see on my facebook

Keep in mind: Anyone can see your public information, which includes your name, profile picture, cover photo, gender, username, user ID (account number), and networks (learn why). Only you and your friends can post to your profile.

Your Facebook searches are private. If you look up someone's profile or they look up yours, none is the wiser. Facebook is very clear on the matter: “Facebook users cannot track who has viewed their personal homepage.