SPIN Selling is an acronym for four types of questions (Situation, Problem, Implication, Need-payoff) a sales professional should ask a prospect to establish a customer-centric selling paradigm and increase closing rate. SPIN stands for the four kinds of questions successful salespeople ask their customers: Situation, Problem, Implication, and Need-payoff. … SPIN selling focuses on asking questions around each of four areas—Situation, Problem, Implication, and Need-payoff—to customize a presentation and learn more about customer needs.