What is the purpose of responsive design testing?

The purpose of responsive design testing is to verify that a web application displays correctly on various screen sizes and orientations. As users access websites on an array of devices—ranging from desktop computers to tablets and smartphones—it is essential for the application to adapt seamlessly to different screen dimensions. This involves not only ensuring that content is visible and readable but also that navigational elements and features function appropriately regardless of the device being used.

Responsive design testing helps identify issues such as overlapping elements, improper scaling of images, or navigation that becomes cumbersome on smaller screens. This level of testing seeks to improve user experience by ensuring that the layout is fluid and that the interface remains user-friendly across different devices and orientations, such as landscape and portrait modes.