@types/command-line-args provides TypeScript definitions for the 'command-line-args' package. This package allows developers to define command-line arguments in a structured way, making command-line interface (CLI) applications easier to manage and use. Installation of these types alongside the core library enables strong typing and improved developer experience, offering autocompletion and compile-time error checking when working with command-line arguments in TypeScript projects. This enhances code maintainability and reduces run-time errors by ensuring correctly typed argument parsing.