SPIN selling is a classic methodology from Neil Rackham's research into large deals, built around four question types: Situation (facts about the buyer), Problem (their pain points), Implication (the cost and knock-on effect of the problem), and Need-payoff (the value of solving it). It is a concrete discovery framework that moves a buyer from "we have a problem" to "this problem is expensive, and fixing it pays." It underpins much of modern consultative selling. It is the methodological cousin of the Challenger Sale, which pushes the same insight-first idea even harder.
In plain English
SPIN is a script for guiding a buyer's own realization. You do not tell them they have a problem; you ask questions until they tell you. The implication questions are the engine — once the buyer calculates what the problem costs, the price of the fix stops being the headline.
Why it matters to you
SPIN gives you a repeatable way to build urgency and qualify at the same time. Reps who use it run discovery calls that end with the buyer convinced, not the rep pitching. Naming SPIN in an interview shows you bring a real, research-backed method to the funnel.