This is an on-premise version of Power BI on the cloud. It allows us to publish Power BI dashboards and reports to an on-premise server to make them available enterprise-wide without having to bother about data management gateways for on-premise sources.

A license for Power BI Report Server is available with a Power BI Premium subscription or an SQL Server 2017 Enterprise Edition with Software Assurance. Once we have one of these, we can install it on a regular on-premise server and save our Power BI dashboards and reports on it.

With Power BI Report Server, we can also share SQL Server Reporting Services reports as well as Mobile reports. SQL Server Reporting Services is the reporting tool used to create corporate or official paginated reports. It's been used for more than a decade now. Mobile reports are meant to be used on mobile devices. They can show KPIs, graphs, and so on, and they are optimized for small screens.

Here is a link to get more information on reporting services and paginated reports: https://docs.microsoft.com/en-us/sql/reporting-services/create-deploy-and-manage-mobile-and-paginated-reports?view=sql-server-2017.

And finally, here is a link to get more information on Power BI Report Server: https://powerbi.microsoft.com/en-us/report-server/. For the development environment, there is a free version of Power BI Report Server available. Simply download the Power BI Report Server, and at installation time, choose Developer Edition in the drop-down list when you're asked to enter a license number.