Power BI Desktop is a free application that enables users to connect, transform, and visualize data. With Power BI Desktop, users can connect to multiple different sources of data and combine them (often called modeling) into a data model. This data model enables users to create data visualization, build customized dashboards which can be shared as reports with colleagues within the organization. Most users who work on business analytics projects use Power BI Desktop to create reports and then use the Power BI services to collaboratively share their reports with others.