Feedback is an opinion that you give after buying something, or using a product, or service.
Most business owners ask for a feedback from customers in order to know if they are satisfied from their product or service ,feedback could be positive or negative and this can influence the development of the product or service.
Also these days we search for feedback for example, when we want to buy a product online and if most of the feedbacks is bad we decide not to buy that product according for the negative feedbacks.
Also business will grow up if there is honest good feedbacks.