simple terms, a value proposition makes a case for why a customer should pick one product over another, citing the unique value the product provides over its contenders.
The Business Model Canvas value proposition provides a unique combination of products and services which provide value to the customer by resulting in the solution of a problem the customer is facing or providing value to the customer. This is the point of intersection between the product you make and the reason behind the customer’s impulse to buy it. A product can have a single value proposition or multiple value propositions