Client-Side Development refers to the process of creating software applications that run on a user's device, such as a computer or smartphone. This type of development focuses on the user interface and user experience, ensuring that applications are responsive and visually appealing. Technologies commonly used include HTML, CSS, and JavaScript. In client-side development, the code is executed in the user's browser, allowing for faster interactions without needing to communicate with a server for every action. This approach enhances performance and provides a smoother experience, making it essential for modern web applications and websites.