- It's a photo album. Anyone who can view your page can see your photos.
- You can also post status updates.
- It publishes a list of your friends. Anyone is free to check that out.
- Your friends can write on your wall, where anyone can see what they wrote.
- It publishes your biographical data: where you go (or went) to school, where you work, whether you're single, and if not what kind of relationship you're in.
- You belong to a number of "groups". The groups don't organize activities or act as chat channels; their purpose is that your page displays a list of the names of the groups to which you belong, and that list is an expression of your personality and/or ideological commitments.
Which of those do WhatsApp groups do?