The key performance indicator or data point or metric they are tracking is “referrals.” A referral is when a person connects with a nonprofit for a volunteer opportunity. This is their key metric because their mission is to strengthen communities by making it easier for good causes/nonprofits and good people who want to volunteer to connect with one another. As Greg explains, their key result is for people to volunteer for a nonprofit organization in the real world, not just find the opportunities which is a step in the ladder of engagement. They know that based on the number of referrals that 50% will result in an actual person volunteering. They know from their tracking and research, that the average site user will connect with three or four opportunities before finding the right match.–Source