Client feedback is important at every stage of website development lifecycle as its the clients who know the market the best. They are the ones who are actually facing the problems for which we are building solutions. Then who can give us feedback better than our clients.
Asking for feedback is an important task, necessary to improve customer experience, but getting actionable feedback at the right time is not an easy nut to crack. Asking for meaningful contextual feedback from your clients, right from the brainstorming phase; gives you an early access to the problems that might deteriorate user experience. Great user experience equals successful website development. And you can only nail UX right, with more and more quality feedback.