Generics are a powerful feature in TypeScript that allow you to write flexible, reusable code while maintaining strict type safety. When you use generics, you can design classes, functions, and interfaces that work with a variety of types instead of being limited to a single one. This approach is especially useful in class design, where you might want your class to handle different data types but still enforce consistent behavior and type checking. By introducing type parameters, generics help you avoid code duplication and reduce errors, making your codebase easier to maintain and extend.

Generics provide both type safety and flexibility. With generics, you can write code that adapts to different types without losing the benefits of TypeScript's static type checking. This means you catch type errors early, while still being able to write functions and classes that work with many kinds of data. Generics are especially helpful in collections, utility functions, and class hierarchies where the exact type may not be known in advance, but you still want to enforce consistency and correctness.