The purpose of a pitch deck is to help the entrepreneur determine if a venture is viable.

The purpose of a pitch deck is to present a business idea or plan to potential investors, partners or customers in a concise and compelling way. It is meant to showcase the opportunity, the problem being solved, the solution, the market, the competition, the revenue model, the team, and the ask. A pitch deck doesn't determine the viability of a venture but rather helps entrepreneurs communicate and test their assumptions, and get feedback and support.