The tutorial describes how to send SMS messages using AWS Lambda and the Go programming language, leveraging the Nexmo Messaging API. To accomplish this, one must have a Nexmo developer account, an Amazon Web Services (AWS) account, and be familiar with the Go programming language. The process involves creating a data model for the request and response, building an HTTP client to send a POST request to the Nexmo Messages API, and defining a handler function that uses the AWS Lambda SDK for Go. Once complete, the Lambda function is deployed to AWS Lambda and integrated with API Gateway to make it accessible as part of standard HTTP requests. The tutorial concludes by highlighting potential use cases, such as sending app store links to users through SMS.