SPIN questions
Situation, problem, implication and need-payoff.
Neil Rackham studied how top sellers behave in large, complex sales and wrote it up in the book SPIN Selling. The method sorts questions into four kinds. Situation questions gather facts. Problem questions find what is wrong. Implication questions ask what the problem leads to. Need-payoff questions ask what fixing it would be worth.
Most sellers stay on the first two. The implication question is the one that turns a nuisance into a priority, and it is the hardest to ask well. Do your homework before the call so the situation questions stay short.
Find your way around
Learn it in the course, copy it from a playbook, see it work in a case study.