It would be very usefull to have a possibility to show a user of an ArcGIS Dashboard that one or more URL parameters are being used. Especially when the URL parameters are used to filter the data. At the moment the only way of knowing there's a filter by a URL parameter, is to check the URL (if even visible).
An idea is to have the URL parameter values as Dynamic Text available within the Dashboard. So you can use it in the Title or other locations to inform the user there's a URL parameter applied.