Belief
Homeowners shouldn't learn who someone really is after they hire them.
Most hiring decisions start with a name, a rating, and a few reviews. That can look like enough, until the work begins. By then, the contractor is already in the home, and the real questions are just getting answered.
What has this person actually done before? What did those projects look like? How did they go? And would the homeowners who hired them before do it again? Quoin exists so that context comes first.