A Go developer, Ricky Robinett, shares a step-by-step guide on how to build a basic Go app that sends an SMS message using Twilio. The process begins by setting up the necessary dependencies, including installing Go and creating a Twilio account. Then, the code is written to make a POST request to the Twilio API with the required parameters, such as the sender's phone number, recipient's phone number, and the body of the message. After sending the SMS, the response from Twilio is handled by checking the status code and parsing the JSON data to retrieve the message SID. The final code is presented, which can be run using `go run twilio.go` to send an SMS message.