Power BI is a business analytics service by Microsoft. It aims to provide interactive visualizations and business intelligence capabilities with an interface simple enough for end users to create their own reports and dashboards.
Use the free Power BI Desktop tool to author reports and prepare, model, and create data visualizations.
Power BI is very much faster in processing while comparing Microsoft Excel. Power BI can smoothly handle a large amount of data while Microsoft Excel is limited to some extent of data. ... Power BI dashboards are more interactive and custom while Microsoft Excel dashboards are not much interactive
Here is a learning documentation about Power BI..