The article explains how to integrate event streaming into an application using Fauna, a serverless database that allows developers to subscribe to real-time data changes. To start, a new React app is cloned and installed with the necessary dependencies, including the Fauna client. A new database is created in Fauna, and a collection called "Transaction" is set up. The article then demonstrates how to use set streaming, which involves subscribing to a collection and listening for any changes made to that collection. This allows developers to access real-time data updates without having to constantly query the database. Additionally, document streaming is also explained, which allows developers to subscribe to specific documents rather than entire collections. The article concludes by providing tips and resources for further learning and development with Fauna.