Responsive Web Design (RWD): Responsive web design refers to the practice of designing and developing websites in a way that ensures they automatically adapt and display optimally on different devices and screen sizes. This includes adjusting elements such as layout, images, and navigation based on the user's device type (e.g., smartphone, tablet, or desktop). The goal of responsive web design is to provide an optimal user experience, making it easy for users to navigate the site and consume content regardless of how they access it. RWD is an essential aspect of modern web development and is a crucial component in user experience design.