This tutorial demonstrates how to use Google Spreadsheets with .NET Core, enabling developers to quickly prototype and integrate their applications with the Google Sheets API. By utilizing the Google API client library for .NET Core, developers can authenticate and access their spreadsheets, perform CRUD operations such as reading, creating, updating, and deleting entries, and even display data in a console application. The tutorial provides step-by-step instructions on how to set up authentication using OAuth 2.0, create a service account, and integrate the Google Sheets API into a .NET Core project.