A satisfaction survey is the questionnaire that is usually administered at the end of the class course or hotel stay. It will either be given to you in person or be an online survey. It usually is a short questionnaire that gauges how satisfied you were with something. A lot of people might look at this as a waste of time. Not worth the effort to spend 5 minutes filling out. Some people might not be honest either.
However, these surveys do serve a purpose. They can offer a company or institution needed feedback as to how they can improve their service, which will actually benefit you in the long run.