A Facebook wall is the area on a profile or page where friends and “fans” can post their thoughts, views, or criticisms for everyone to see. Walls have three viewing settings: user + others, just the user, and just others. These settings can be changed by clicking the "filters" option at the top of the wall. Most walls automatically display the "user + others" option, showing posts, links, tagged material, and other information posted by both the page's operator and their friends or fans. Walls also incorporate the news feed, displaying updates made by the user such as statuses, links, pictures, and other recent activity.
Abbey Klaasson discusses how a high click-through rate for content posted on Facebook walls can help marketers manage their social media presence.
Facebook Help Centre answers frequently asked questions about Facebook walls and how to use them.