The article is the final part of a series on building a Fullstack React and GraphQL application using the Apollo Client. It focuses on setting up a React application with an Apollo GraphQL client, integrating it with an existing backend built with Express and Couchbase. The tutorial guides users through cloning a pre-built React app from GitHub, setting up the directory structure, and configuring the Apollo Client to connect with a GraphQL API. It explains how to build a master-detail page for displaying airline data, using React Router for navigation, and managing data queries with the useQuery hook from Apollo. The guide also discusses setting up CORS to allow API requests between different domains and provides instructions for running both the server and client concurrently using npm scripts. Furthermore, it emphasizes securing sensitive credentials by using a .env file and concludes by offering resources for further exploration of Apollo and React development. The final project code is available on GitHub, and the author invites readers to connect on Twitter for additional support.