The power dashboard is an overview of all of the power statistics for your site from one convenient page. It can be accessed from the Power link in your site dashboard or in the navigation sidebar. Once loaded you will be greeted with a number of charts and statistics for your site. Using this information you can determine any problems that may currently be affecting your site and can help to plan what should be looked at in order to keep your site as efficient as possible.
Ensure that the relevant power settings are set up on your site in order to view power and get accurate statistics.