Display modes refer to the different ways a screen can present visual information. Common display modes include landscape, where the width is greater than the height, and portrait, where the height exceeds the width. These modes are essential for optimizing content viewing on various devices, such as smartphones, tablets, and monitors. In addition to landscape and portrait, some devices offer split-screen or picture-in-picture modes, allowing users to view multiple applications simultaneously. These modes enhance multitasking and improve user experience by providing flexibility in how information is displayed and interacted with on the screen.