The listing optimization function of the app is a wonderful way to highlight all the points that need to improve on your listing and will do so according to Amazon TOS so that you will not get banned or risk having your listing taken down. The keyword feature is great to find competitor keywords and ones most related to your listing. You can add all keywords with a click of button. River Cleaner just makes creating and optimizing your listing much easier and will save you a lot of time. I recommend it to everyone!