Overview...
Handles your Nefsis account information, such as name, company, address and whether or not you are publically listed on the Nefsis global directory, so that other Nefsis users can search and find you.
Even if you are not publically listed, people can still add you to their contact lists by entering your exact email address.
Address and phone...
This information (while not required) can be useful for other Nefsis users who want to try and find and add you to their own contact list. The more information you provide will help users search for you.
Other...
This information (while not required) can help with other users who are trying to find and add you to their own contact list.