It's not about well-rehearsed acting to bluff clients (like conventional management consultants).

Impro is about improvisation: having a deep reservoir of experiences and reference points, but no pre-planned templates; empathizing with the client's situation; thinking fast; being open-minded and creative; challenging received wisdom; pulling disparate ideas together; assembling a synthesis; embodying a story; imagining a solution; presenting difficult concepts smoothly; having conviction in your ideas; high risk tolerance; be convincing; be committed to doing what you say and implement what you imagine; create a technical solution, an operational scenario, a bottom-up deployment plan, and a path to win strategic acceptance based on results.