Once you used a product or service, you qualify well known about it. Then you can refer your experience

or

about the item. Of course, if any referral commission, you will be motivated!
If a product or service is referred by a friend who has purchase experience, most likely it is

as reliable.
Taking care of everyone like an egg carefully, make them grow to become strong like a tree.
If you can make your group as active business to grow, means you have leadership skills. Do not laugh, not everyone can make it grow, your member friends do not have to stay without your leadship unless they want to.