Mobile responsive refers to the design and development approach of creating a website, application, or digital content that adapts and adjusts its layout, structure, and functionality to provide an optimal viewing and user experience across different screen sizes and devices, particularly on mobile devices such as smartphones and tablets.

A mobile-responsive design ensures that the content and elements of a website or application automatically resize, rearrange, and reposition themselves to fit the screen size and orientation of the device being used. This allows users to easily navigate, read, interact, and consume the content without having to zoom in or scroll horizontally. By implementing a mobile-responsive design, businesses and developers can cater to a larger audience, improve user engagement, and provide a consistent and enjoyable user experience across different devices, ultimately leading to higher customer satisfaction and retention.