Facebook 
statistics show  that it has 250 million active users each with an average 120 friends.  More than 1 billion photos are uploaded every month by its users, over  70% of whom use applications like games and quizzes in Facebook.  Unfortunately, most users don’t know the implications of entering  personal information, making friends, and playing games on Facebook.
This guide will show what you can (and cannot) do to safeguard your Facebook privacy.
1. Organize Friends in Lists
What  do you do when your boss, mother-in-law, or a casual web acquaintance  sends you a friend request on Facebook? Use Friend Lists. Friend Lists  are the foundation of your Facebook privacy settings. Select 
Friends from the top menu, and use the 
Create  link to create friend lists like Co-workers, Family, College Friends,  etc. Your friends can’t see your lists, so you can name them whatever  you like.

Tip: On your left sidebar, all your friend lists may not show up by default. Click 
More to see all of them, and drag and drop those you want above the separator.
2. Customize Profile Privacy
Click 
Settings > Privacy Settings > Profile. Select which parts of your profile will be seen by whom.

If you choose 
Customize in the drop down, you can be more specific. This is where the Friend Lists you created before become really useful.
Also go to the 
Contact Information tab and choose how you want your contact information to be shared on the Internet.
3. Set Facebook Privacy Level of Photo Albums
On the 
Photos tab of your profile page, click 
Album Privacy. Here again, you can use your Friend Lists to set the privacy for each photo album.
Note that your profile pictures go into a special album that is always visible to ALL your friends.
4. Restrict Search Visibility
Click 
Privacy > Search  to set your visibility when someone searches Facebook for people. This  is an important way to safeguard your Facebook privacy.  You can also  select what will be visible in the search results.
5. Control Automatic Wall Posts and News Feed Updates
Your  actions in Facebook such as comments, likes, appear as highlights on  ALL your friends’ home pages. You cannot use friend lists here, only  turn them on or off.
Go to 
Privacy > News Feed and Wall and choose whether you want your boss or ex-girlfriend to know that you’re in a relationship.
6. Set Facebook Wall Privacy
Go to your profile page, click 
Options > Settings under the status box.
Here you can control whether your friends can post to your Wall, and who can see the posts made by your friends.
7. Avoid Appearing in Advertisements
Facebook has two types of advertisements: third-party and Facebook. Third-party advertisements are 
currently not allowed to use your pictures, but there is a setting to disallow it 
if it is allowed in the future. Go to 
Privacy > News Feed and Wall > Facebook Ads tab to turn this off.

The  Facebook ads shown to your friends are about “˜social actions’ like  becoming a fan of something. You can turn this off at the bottom of the  page.
8. Protect Yourself from Friends’ Applications
Go to 
Privacy > Applications, and click the 
Settings  tab and uncheck all the boxes. These settings control what information  about you is visible to applications installed by your friends. By  default, these are set to visible. This means that your religious,  sexual, and political preferences, pictures, etc. are readily available  to one of the million worldwide Facebook application developers, each  time any of your friends takes a quiz, plays a game, or runs any other  Facebook app. This is obviously a Facebook privacy issue.
This is the most 
commonly misunderstood aspect of Facebook privacy. These settings control what applications installed by your friends can see about you, 
even if you don’t install the application yourself.
Why is this important? Because these settings will 
not change anything about what you are sharing with the applications you install yourself. For that, go to the next step.
9. Privacy from Your Applications
There is no way to control what applications see about you; it is an all-or-nothing affair. Take 
this quiz developed by the 
American Civil Liberties Union to check what anonymous application developers can know about you and your friends each time you take a quiz.
The Burton Group’s 
Identity Blog features the Facebook 
Privacy Mirror,  an application that you can use to find out what applications know  about you and your friends. If you really want to see exactly what  profile data of each of your friends is visible to application  developers, 
Privacy Mirror shows it in detail.
The only thing you can do is to authorize only those applications you require and trust. Go to 
Settings > Application Settings from the top menu. Change the drop-down from 
Recently Used to 
Authorized.  Here you can see all the applications you have authorized to get access  to ALL your profile information. Remove the ones you no longer need.
Also check the list of applications 
Allowed to Post and 
Granted Additional Permissions to remove unwanted ones.
10. Quitting Facebook? Delete, Don’t Just De-Activate Your Account
You can easily deactivate your account in Facebook from the 
Settings  page. But deactivation will retain all your profile information within  Facebook, including pictures, friends, etc. If you want to permanently  delete your Facebook account, 
click here to submit a deletion request. Note that:
- There is an unspecified delay between submitting your delete request and actual deletion.
- If you login to Facebook, your deletion request is automatically cancelled.
- There doesn’t seem to be any way to confirm that your request was completed.
- Even after permanent deletion, Facebook says that copies of your photos may remain on their servers for technical reasons.
Also,  note that once in a while, there is news of a Facebook hack or leak  that can expose your information on the Internet. It is better to be  safe than sorry by avoiding using Facebook for anything that may  embarrass you.