This package provides TypeScript definitions for the express-serve-static-core module, crucial for type safety when working with Express.js. Specifically, it defines interfaces and types for request, response, and static serving functionalities. Including these definitions allows TypeScript to understand and validate your Express code, preventing runtime errors and enabling better tooling support like autocompletion and refactoring. It's essential for TypeScript projects leveraging the Express framework as it bolsters maintainability and developer productivity.