package.json serves as the configuration file for a Node.js project, providing information on how the application runs and interacts with dependencies.
Metadata in package.json includes details like the project's name, entry point, version, and custom commands.
Node.js offers two module systems: CommonJS (CJS) and ES Modules (ESM), each affecting how code is written, organized, and shared.
Understanding package.json and selecting the appropriate module system are key to developing clean, maintainable code in Node.js, crucial for personal apps or reusable modules.