Steps to Make Facebook Account Private
Click on the little white downwards triangle at right of the top menu. Then click "settings".
If you want to lock down the Ads settings, so that Facebook won’t track you and tailor the ads to you, then click on "Ads" in the left menu:
Change the following settings:
Click "Your interests" section.
If you’ve been a long time Facebook user, you may be surprised what Facebook thinks it knows about you! By default, Facebook tracks what you like, interact with and visit and it comes up with a selection of your "interests".
You can add them or remove them accorting to your own interest and choice.
Click "Your information" section.
Some of the ads you see are because advertisers are trying to reach people based on information they've provided on their profiles.
Here you will get first Tab of "About you" you'r Profile information like:
with the help of this information Facebook show you ads according to your Relationship status, Employer, job title and eduction, you can set it "On" or "OFF" according to your choice.
Second Tab is "Your Categories".
The categories in this section help advertisers of Facebook reach people who are most likely to be interested in their products, services, and causes. Facebook added these categories based on information you've provided on Facebook and other activity.
You can Add or Close these categories according to your choice.
After "Your Information" Section Click "Ad Settings" Section.
You may want to control that people can post to your timeline and whether you want to be tagged in a post. To be private, You should switch all of those off.
If you never intend to post to Facebook, then it is a good idea to lock down your future posts.
"Who can see your future posts?". Click "Edit", then click "public" and then click "More" now select "Only Me".
How People Find and Contact You
You can’t totally stop being sent friend requests, but you can change the setting so that only "friends of friends" can send you a request.
"Who can send you friend requests?" Click "edit" and change to "friends of friends":
Facebook makes it easy for people to find you from your email address. This is why, if you want to be private on Facebook, it is so important you use a separate email address.
To edit your profile, click your name on the top menu and then click on "about":
The default privacy settings is for everything to be shared with your Facebook "friends" or "Public".
If you want everything hidden, unfortunately you’ll need to go through everything, edit, and change to "only me".
Contact and Basic info.
Click on "contact and basic info" in the left menu. For each bit of information click on the edit link on the right. Then click on the privacy icon and change to only me, then click "Save Changes":
Same the example above you can change the following list of details in your profile.
To edit your Friends Settings, click your name on the top menu and then click on "Friends".
By default, everyone can see who your friends with. To change this, click on "Friends" in your profile, then click on the edit button (There will be a pencil icon on the top right), click on "edit privacy".