Thank you for the invitation. It is not hard recognise a satisfied customer. The best way in my opinion - to that customer returns often to your shop and seeks you out.
Provide the most affordable, durable, unique, innovative & quality product to the customers- they will be delighted (wow).
Offer the best customer service experience & post purchase services to the customer-follow ups, feedback on how your product is performing, offer technical expertise to customers etc- they will be delighted (wow).
Thanx for the invitation