Growing a successful small business depends on repeat clients, and clients only come back when they are extremely happy with the products or services you're providing. It should go without saying that your initial focus should be on providing an exemplary product or service. Once you have that solid foundation, it's time to focus on the second part of generating repeat business — tailoring your offerings to exactly what your clients need and want.
https://www.thebalance.com/how-to-ask-clients-for-feedback-2951753/
Online surveys are a quick and incredibly useful tool for gathering all sorts of user feedback. In next to no time you can whip something up using one of the many online survey tools out there and start gathering feedback from real users.
http://www.uxforthemasses.com/online-survey-questions/