A customer comment card invites clients of a company to give feedback and express their opinions. These cards serve to measure the levels of customer satisfaction and also indicate areas that are in need of supplementary resources or expansion.
Frequently, customer comment cards serve as a sounding board for dissatisfied people. Sometimes, having the opportunity to fill out a comment card keeps an unsatisfied client from using a blog, Facebook, Twitter or other social media account to vent his feelings about the company all over the Internet. The card allows the company to deal with the situation personally and reach out to that customer to remedy the issue.