Serverless applications are becoming increasingly popular due to their cost-effectiveness, quick deployment times, and pay-as-you-go pricing models. This tutorial demonstrates how to send serverless emails using Twilio Functions and SendGrid, two leading cloud-based platforms. To get started, developers need to create accounts with Twilio and SendGrid, install the necessary tools, and set up a project structure. The tutorial then guides users through creating a server function that leverages the `@sendgrid/mail` npm package to send emails via SendGrid. After deployment, users can test their functions locally or remotely using a URL copied from the deployment screen. The tutorial concludes by highlighting the benefits of using Twilio and SendGrid for serverless email sending, making it easier for developers to integrate email functionality into their applications without worrying about infrastructure costs.