What does responsive design ensure for web applications?

Responsive design is a web development approach that aims to ensure web applications look and function effectively across a wide range of devices, including desktops, tablets, and smartphones. By utilizing flexible layouts, images, and cascading style sheets (CSS) that adapt to the size of the user's screen, responsive design provides a seamless viewing experience.

This approach is essential because it accounts for the increasing variety of devices used to access the internet, each with its own screen dimensions and orientation. By focusing on a single responsive design that adjusts to varying screen sizes, developers save time and resources, avoiding the need to create separate versions for each type of device. This ultimately enhances user experience by ensuring that content is accessible and visually appealing regardless of how it's viewed.