There is an assumption that the higher the response rate is to the survey, the more accurate the results will be. Oftentimes the first question I will get about a survey is about the response rate, because people have been conditioned to connect a low response rate with inaccurate results. This is most often used when someone does not like the results of the survey. A low response rate lets people dismiss findings that they don't want to hear without actually having to deal with those findings.

But (shhhh) nobody really knows what a good response rate is.