This article guides readers on how to set up open and click tracking for emails sent from Java using Twilio SendGrid. The process involves creating a new Spring Boot application, setting up event webhooks with ngrok, enabling open-tracking and click-tracking in SendGrid, configuring the webhook URL, and testing the integration. Once set up, the application can store open and click events in maps and provide endpoints to retrieve the data. The article also provides an example of how to send email using Twilio SendGrid and track clicks on links.