What’s a 2nd degree connection?

Joinable is a social network similar to LinkedIn with 1st degree (friends) and 2nd degree (friends-of-friends) connections. This opens the possibility of connecting with and meeting people who are in your friend network. 2nd degree connections have a more limited view of profile information, cannot message you directly (without request), and can only see activities you explicitly share with 2nd degree connections. Sharing with 2nd degree people is completely optional.