Twilio Sync is a cloud synchronization service that can be used to push updates from a server to connected clients. In this tutorial, an example of how to add server push capability to a web application using Flask and React, with Twilio Sync as the chosen solution for this task. The tutorial provides five steps to complete the project: generating access tokens, connecting to a sync object, accessing historic data, subscribing to updates, and pushing updates. The code examples provided in the tutorial demonstrate how to implement these steps and connect the front end application to the back end server using Twilio Sync.