Whenever you create a group, a Suggestions popup will be shown to you, enabling you to selectively suggest your group to friends. You can select your desired friends from this popup and send suggestions to them for your group. You and other visitors to your group can also suggest your group to friends any time by using the “Suggest to Friends” link available in the left quick links on your group Profile. While sharing enables users to share your group with all their friends, suggestions enable suggesting your group to selected friends.