This summary provides an overview of building a GraphQL application using Spring Boot, Java, and Couchbase Server as the NoSQL database. The application is designed to serve as a RESTful API endpoint for executing GraphQL queries, with schema definition, database logic, and integration with Couchbase. The example includes setting up the project structure, defining the GraphQL schema, developing the fetching logic for the Couchbase NoSQL database, wiring the application together for successful GraphQL processing, and initializing the GraphQL schema. The resulting application allows for querying multiple unrelated pieces of data in a single request, which would have required several requests in a traditional RESTful API.