What is the purpose of the closing page to my survey? Am I am to customize the closing page if I decide to use it?

Closing pages can be used as a way of thanking your participants for filling out your survey. It is an optional feature that displays to participants automatically upon completion of your survey. It can be set up as a webpage that already exists or you may use the default message. The only time the closing page may be edited is if you are providing the URL from an already existing page. It would need to be customized at your end. However, the default message provided by Benchmark Email cannot be edited.