A person's profile contains their picture, plus personal and contact information that gives others a snapshot of who they are and how to get in touch with them.
If you are an external user (you normally connect to a different system, and are here because you were invited), you will only be able to open the profiles of other external users. In addition, you'll only see external users' pictures. You are still encouraged to use a web browser to fill in your own profile, so others on this system will know who you are.
If you are looking at someone's profile, and you want to add them to your people list, choose Follow from the options menu. To stop following them, choose Stop Following from the menu. To chat with them, choose Chat from the menu.
To email them, touch their email address. A new message form opens, preaddressed to them.
To phone them, touch their phone number. Your device's phone application opens, displaying this number.