RootCloak is an app that lets you hide the root status of your Android device so other apps won't detect it as being rooted. Why would you want to do that? Easy, because there are apps that won't work on rooted smartphones.
Using RootCloak properly is easy, but remember to install Xposed first. Once you've installed Xposed, you'll be able to install RootCloak's APK. After running the module and restarting your device, you'll start to use the app correctly.
RootCloak's interface is very simple: all you need to do is choose which apps you want to "trick" so they don't know that your device is rooted. If you can't find that specific app on the list that appears by default, all you'll need to do is search for it manually, and add it to the list. It's that simple.