This video demonstrates how to create an authenticated application using AWS Amplify and send a welcome email after user signup. The tutorial covers setting up AWS Amplify, configuring Amazon Cognito for authentication, and creating a post-confirmation Lambda trigger to send emails via Amazon SES. The step-by-step process includes initializing an Amplify project, adding authentication, and implementing the email sending functionality. The video provides a practical guide for developers looking to enhance their user onboarding process with automated welcome emails.