This version of Power BI is meant to be used by enterprises with many users and large volumes of data. It reserves resources on the cloud specific to the client. This means that we are assured to get lots of high performance when it comes to dashboard and report usage. This reserved capability comes at a price though, and there's a calculator that helps us define our needs that can be found at the following web page: https://powerbi.microsoft.com/en-us/calculator/.
For more in-depth information on Power BI Premium's capabilities, see the following URL: http://download.microsoft.com/download/8/B/2/8B23B40C-E94B-49D6-AF19-456AC4D5DB00/Microsoft%20Power%20BI%20Premium%20Whitepaper%20Oct%202017.pdf.
