This tutorial demonstrates how to use MongoDB's GridFS feature with the official Go driver to store and retrieve large files. The author provides a step-by-step guide on how to set up the development environment, connect to a MongoDB cluster, and upload and download files using GridFS. The example uses the VS Code editor and the Go extension to simplify the process. The tutorial covers key concepts such as file streaming, chunking, and metadata storage, and provides an overview of the benefits of using GridFS for storing large files.