Obtaining diner feedback is very important to any restaurant as they will be able to understand just how content the diner was with your meal and service.
Additionally, allowing your customers to write positive reviews about your restaurant and having them readily visible on your website will also bode well when it comes down to attracting new diners as previous reviews will heavily impact the decision as to whether the potential diner wants to visit your restaurant.
Having the ability to greatly understand what your diners are after or how they feel about your new dish would lead to a much more fulfilling experience. This is also a great way to show just how much you value your diners opinions and insights - in turn showing how much you value your diners.
Feedback and review will also allow you to find out areas in the restaurant that need further improvements, allowing you to respond to any dissatisfied diner within minutes and finding a solution to fix the issue. This could often be a great way to regain your diners trust and further encourage them of your quality assurance.