The text provides a detailed overview of building a simple JSON HTTP web service using Golang, aimed at creating an activity tracker application. The author highlights Golang's advantages, such as a small memory footprint, ease of use, and a robust standard library, making it suitable for developing web services that run on Linux servers. The process involves setting up a basic Go HTTP server, implementing handlers for GET and POST requests, and employing the Gorilla web toolkit for routing. Integration and end-to-end tests ensure functionality, while in-memory data structures are used to store activity data. JSON encoding and decoding are implemented for data interaction, although the service lacks persistence, a user interface, and access beyond ID-based retrieval. The author plans to expand the project with a command-line client and other features, emphasizing the learning experience in web service development using Golang. The article also mentions using Earthly for build simplification and testing, and addresses common errors and solutions encountered during development.