Microsoft Power BI is a collection of software services, apps and connectors that work together to turn your unrelated sources of data into coherent, visually immersive and interactive insights. Whether your data is a simple Microsoft Excel workbook, or a collection of cloud-based and on-premises hybrid data warehouses, Power BI lets you easily connect to your data sources, visualize (or discover) what’s important and share that with anyone or everyone you want.
Desktop: A free application you install on your local computer that lets you connect to, transform and visualize your data.
Service: A SaaS service which brings together dashboards, workspaces, reports and datasets for keeping a finger on the pulse of your business.
Mobile: Connect to and interact with your cloud and on-premises data. You create reports in Power BI Desktop. You create dashboards and view dashboards and reports in the Power BI report service. You view on-premises Power BI reports on Power BI Report Server. All these reports and dashboards are available in the Power BI mobile apps, whether they’re on premises or in the cloud