With considerable input from marketing, customer support, and sales, the product team should have a say in the process of establishing a value proposition. Everyone will be aware of the main points to concentrate on thanks to the combination of product and consumer viewpoints. PMs (product managers), in particular, should make an effort to participate in the refining process. PMs have the chance to offer input during this process regarding the values that they believe to be most crucial.
Also, a clearly defined value proposition will give every department of your company a clear understanding of why their function is essential to satisfy your customers.
Be it the product development team, front-line service staff, customer service, etc., to understand what value it should deliver or for the marketing team,
sales team, advertising agency, etc. to clarify how to communicate and represent your company - a value proposition is the definition of your company.