Whenever you post something on your Facebook wall, you have full control over who will see it - in many cases, you will want to hide your wall posts from non-friends, if only to be on the safe side: many people have had problems with their employer when some of their posts became known. But as you'll learn in this tutorial, you can even hide your wall posts from everyone. There is no right answer when it comes to your Facebook privacy, but we recommend that you err on the side of caution, when in doubt! The second part of this tutorial also explains how to allow or prevent other Facebook users from posting on your wall.
Once you are signed into your Facebook account, click on the dropdown arrow in the top right corner of the page, and select "Privacy Settings" - now follow these steps:
This is how you control the privacy of your wall when it comes to posts made by others. Here's how you can allow or prevent Facebook users from posting on your wall:
Let's now show you how to control the visibility of your own posts on your wall:
While you are still on the Privacy Settings screen, click on the "Manage Past Post Visibility" link next to "Limit the Audience for Past Posts" near the bottom of the page. When the "Limit Audience..." popup opens, clicking on the "Limit Old Post" button will hide all old posts on your wall from anyone on Facebook, with the exception outlined on the dialog - friends, and tagged people, may still see these posts for shared content.
To completely hide an old post and "granularly" control which Facebook users can see it, go to the post, move your cursor above it, and choose the level of privacy / visibility with which you fell comfortable.
From this point on, simply remember to target the visibility of new posts you make on your wall: before clicking on that "Post" button, take a second to pick a target audience, like this: