When you "like", share or comment on a Facebook post, persons you do not know are able to view what you have shared, commented on or liked, by default. If you are concerned about who is able to view your comments, photos, videos, the posts you liked or shared, you may need to learn more about your privacy settings on Facebook. Below are tips that will help you with your Facebook privacy. You may also want to educate your friends about these tips because they also affect your privacy on Facebook.