The tutorial outlines the process of building a customer review application using Golang, HTMX, Twilio, and Gemini. The application allows users to submit reviews, which are then analyzed by Gemini for sentiment analysis. The results are displayed on the webpage, and a notification is sent via SMS to the product owner with the rating submission. To build this application, developers need to have basic knowledge of Go and its concepts, as well as create an account with Twilio and set up their environment with necessary dependencies such as Gemini API key, Twilio credentials, and SQLite database. The tutorial covers how to initialize the Gemini AI client, create a function for sentiment analysis, send SMS notifications using Twilio, handle form submissions, and test the application.