Microsoft Power BI is a business intelligence and data visualization tool that allows users to connect to various data sources, transform and clean the data, create reports and dashboards, and share them with others. A Power BI course would likely cover topics such as connecting to data sources, creating visualizations, building and publishing reports, and using advanced features such as DAX (Data Analysis Expressions) and Power Query. Power BI courses may also focus on real-world scenarios and best data analysis and visualization practices.