• When a LinkedIn member is not part of your network, their profile has limited visibility. In other words, they are not your first, second, or third connection, and you do not share LinkedIn groups.
• If a LinkedIn member is not in your network, there are a few things you can do. For instance:
• Join a group that they are already a part of;
• Make significant relationships to expand your network;
• Find and add common relationships (but only of it makes sense, do not add people randomly).

Read More: Why does LinkedIn have a connection limit?