Your "Wall" is a place to receive comments from others directly on your profile.
To change your wall settings:
- Tap "Profile" by clicking on your profile photo on the top left of the Home page
- Tap anywhere on your Z-Card at the top of the page to access your profile
- Tap the "..." on the top right of your profile page
- Tap "Public Profile Privacy" on the bottom of the list
- Tap "Wall Settings"