You've made serious mistakes and wasted time and money developing something that nobody wanted!
What am I going to do? What products or services do we offer to each Client Segment? Why will customers buy from you and not from your competitors?
The "Persona" section of the "Value Proposition" is divided into 3 parts (Tasks, Pains and Gains) and is excellent for understanding your customer.
The "Customer Tracking" section of the "Business Model Canvas" aims to identify the profile, the persona, of our customer.