Responsive design is a web design approach that ensures that a website's layout and content adjust for viewing on any device, regardless of screen size. This means that a website designed with responsive design will look and function well on desktop computers, tablets, and smartphones.
Responsive design involves creating a single website that can adapt to different device types and screen sizes, rather than creating separate websites for each device. This approach helps to ensure that a website is accessible and easy to use for all users, and can help to improve the user experience.
One big advantage of responsive design is that it takes less work to implement and maintain than adaptive design. Rather than creating multiple layouts, one layout is optimized for different screen sizes.
Another advantage is that all screen sizes are supported. New devices and new screen sizes are constantly being released, and responsive sites can ensure proper user experience.
A disadvantage is that responsive design takes more code to implement. Designers have use a combination of flexible grids, layout structures, and media queries in the website's CSS (Cascading Style Sheets).
Since one design is used for all devices, it's impossible to control the layout and optimize user experience on every device. The entire code will be delivered regardless of device, which can also slow down loading time and compromising user experience.