Power BI is a cloud-based suite of business analytics tools that unifies data from many sources to create interactive, immersive dashboards and reports that provide actionable insights and drive business results. Now, Power BI for Office 365 is BI solution that works from within Excel and other Office 365 products to analyze and visualize data, it integrates with O365 products and publish reports for Sharepoint web, PowerPoint, Microsoft Team, Microsoft Flow etc. Resources & References :: Other Microsoft Power BI Forums and Documentation Links.