The document discusses how modular design can improve projects by making them good, fast, and cheap. Modular design uses standardized, reusable components or modules to reduce duplication and costs while allowing customization. It presents the concept of atomic design and describes how patterns libraries, custom fields, and a modular process can help create reusable WordPress modules that encapsulate structure, presentation, and interaction. Examples are given of common modules like banners, links, and galleries that could be created.