What's the role of the feature lead in agile projects?

"They are the team members whose job it is to be the customer proxy for a feature, defining what is important to the customer and owning implementation end-to-end. They are assigned these roles because of the number of features that exist in a typical product. Being a feature lead takes both attention to detail and orchestration capabilities in order for the feature to be well defined, implemented, and delivered. " What’s their role details ?