Power BI is a business analytics service developed by Microsoft. It provides a suite of tools and services for data visualization, business intelligence, and interactive reporting. With Power BI, users can connect to various data sources, transform and clean the data, and create interactive visualizations and dashboards.

Key features of Power BI include:

1. Data Connectivity: Power BI allows users to connect to a wide range of data sources, such as databases, spreadsheets, cloud services, and online data sources like Salesforce and Google Analytics.

2. Data Transformation: Users can perform data transformation tasks like cleaning, shaping, and modeling the data using Power Query Editor.

3. Data Visualization: Power BI offers a variety of visualization options, including charts, graphs, maps, tables, and custom visuals, to represent data in a meaningful and visually appealing way.

4. Interactive Dashboards: Users can create interactive dashboards by combining multiple visualizations and reports, allowing them to explore data and gain insights at a glance.

5. Sharing and Collaboration: Power BI allows users to share their reports and dashboards securely with others within or outside their organization. It enables collaboration, real-time data updates, and commenting on shared content.

6. Natural Language Queries: Users can ask questions about their data using natural language queries, and Power BI will generate visualizations and insights based on the questions asked.

7. Mobile Accessibility: Power BI offers mobile apps for iOS and Android devices, allowing users to access their reports and dashboards on the go.

Power BI is widely used by businesses and organizations to analyze data, monitor key performance indicators (KPIs), make data-driven decisions, and gain insights that can lead to improved performance and efficiency. It is available in various editions, including Power BI Free, Power BI Pro, and Power BI Premium, each offering different levels of features and capabilities.