The tutorial demonstrates how to create a chart from Notion database data using Node.js, QuickChart, and Imgur. The process involves setting up a Notion integration with the required API keys, querying the database, generating a QuickChart, swapping links between QuickChart and Imgur, and replacing existing images on the Notion page with new ones. By following this tutorial, users can harness the power of multiple APIs to provide non-native functionality to their Notion pages, enabling visualization and data analysis capabilities.