This tutorial guides developers through importing MongoDB collection data into Couchbase using Golang. It begins by discussing how to export MongoDB collections as JSON files and then explains how to modify the structure of these documents for use in a Couchbase bucket. The author provides sample code for a Go program that reads from a JSON file, manipulates each document, and inserts it into a Couchbase bucket using goroutines for parallel processing. Finally, the tutorial outlines steps for running the MongoDB to Couchbase importer and suggests optimizing the code further based on individual needs.