See the playbook linked below which delves into defining the reasons why your organization has Nintex Promapp. Ideally this brings to light the problems that Promapp helps to solve.
Let us know how you have gone about defining your 'Why' and how this has evolved over time.
https://go.promapp.com/promapp/Documents/Minimode/Permalink?crypto=BnswHyJwzb9ckXM6l4DgxL
