When you are adding a Metric to a Widget, one of the choices you can make is whether the Metric will be "hard coded" to a specific hotel, or if it will instead utilize a Universal Variable.
A Universal Variable will begin by setting Hotel to "Current".
This tells the Metric to use the hotel that you have selected in the upper left menu (under the Revcaster logo).
One of the main reasons you would utilize a Universal Variable is so you would only need to build one dashboard that could be used for any hotel within your portfolio.
You would view the Dashboard where the Universal Variable is in use, and then toggle the hotel choice in the upper left.