The object-oriented programming paradigm emphasizes code reusability and modularity through the use of classes and objects. This paradigm allows developers to create objects that contain both data and methods, facilitating better data encapsulation, inheritance, and polymorphism. By organizing code into manageable units, object-oriented programming improves software structure, making it easier to design, maintain, and extend applications. Its focus on real-world modeling enhances clarity and aligns software design with user needs.