Design systems have become essential tools in modern web design, providing a cohesive framework for creating consistent, user-friendly websites by offering a collection of reusable components, patterns, and guidelines. These systems streamline the design and development process by establishing a single source of truth for visual and functional elements, which helps maintain brand identity and usability across all pages, regardless of the number of developers involved. By reducing redundancy and enhancing scalability, design systems facilitate efficient updates and expansion while ensuring a unified user experience. They incorporate various elements such as component libraries, pattern libraries, style guides, design tokens, and icon libraries, each contributing to the overall visual and functional consistency. There are two main approaches to creating design systems: building from scratch for a fully customized system or adopting and customizing an existing system for efficiency. Examples from companies like Salesforce, Atlassian, Shopify, NASA, and Adobe illustrate the diverse ways design systems can be implemented to suit specific industry needs, emphasizing the importance of design systems for maintaining consistency, enhancing efficiency, and supporting scalability in web design.