Modular design is an approach that breaks down a product or system into smaller, self-contained units called modules. Each module can function independently but also works together with other modules to create a complete system. This design method is commonly used in various fields, including architecture, software development, and manufacturing. The main advantage of modular design is its flexibility. It allows for easy updates, repairs, or replacements of individual modules without affecting the entire system. This can lead to cost savings and quicker production times, making it a popular choice for companies looking to innovate and adapt to changing needs.