Protect your Facebook privacy
The New York Times has an excellent article showing an overview of all (current) Facebook privacy settings. To protect your privacy you should use a setting of “Only Friends” or “Only Me” (via Custom) and disable pretty much every kind of sharing. If you do not understand what a setting means and you value your privacy then be sensible and disable the setting.
The last and quite important one in the right side in the picture called ” Facebook Ads Page” can be found (when already logged into Facebook) by clicking on Account then Account Settings and then select the tab on the right side called Facebook Ads and set *both* options (at the top and bottom) to “No one”. You have to do that separately for each one. So select “No one” in the top option and click “Save Changes” and then do it again for the bottom one.
Or you could just delete your Facebook account by clicking on Account then Account Settings and then select Deactivate Account. Once you have done that, do *not* log in to Facebook for at least 14 days or else Facebook will magically reactivate your account. The Facebook help page on this subject can be found here.
Remember, Facebook’s business is your information so the more information they have, the more money they can make.