The restaurant would have to give the free samples to its customers so that they would provide a feedback for the business.
<h3>What is feedback?</h3>
This is the word that is used to refer to the information that one has to create or give as way of reacting to the use of a product or of a new service.
This is a way of bringing about improvements or about bringing a new line into a new market. The customers in this case would have to tell the restaurant what they think about the new dish.
