The text discusses modularizing GraphQL schema code by splitting up the schema types and associated resolvers into multiple files. It presents a straightforward method for doing so using JavaScript concepts, allowing developers to organize their codebase in a logical and efficient manner. The approach involves importing type definitions across different files, combining them later, and separating resolver code from schema definition files. Additionally, it introduces the concept of type extensions, which enables defining new fields on existing types without modifying the original type definition. This allows for better organization and reusability of code, making it easier to maintain and extend the GraphQL application as it grows in complexity.