If you choose to share things publicly on Facebook, anyone with an account will be able to find and view your Facebook information, posts, and activity. This could impact your privacy in a variety of ways. For example:
You could be sharing personal information you’d rather keep private, such as your birth date and address.
Anything you post, such as photos, comments, and status updates, will be visible to people you don’t know.
Embarrassing or unflattering posts could negatively affect your personal and professional reputation.
Third-party websites and applications can access and share information from your Facebook account.
Understanding basic privacy settings
Whenever you share something on Facebook, you can choose who you'll share with. In the infographic below, you can see the most common sharing options, including Only me, Lists, Friends, and Public.