This summary provides an overview of creating a GraphQL API with PHP and Couchbase as the NoSQL database. The process involves installing necessary dependencies, setting up a connection to Couchbase, defining data models using GraphQL objects, developing queries to populate these objects, and configuring the application for use with GraphQL. The example uses Pokemon data as a model to demonstrate how to create a data relationship between different fields in a single object. The code also showcases modularizing queries on a per-field basis to manage complex relationships.