Explain the need of display mode in MVC?

A display mode is a powerful tool for all mobile-based apps development. However, it is not limited to mobile web apps but it can also be used to display any alternative view, which is tied to an existing controller. Display Modes practically give you another level of flexibility on top of the default capabilities we saw in the last section. Display Modes can also be used along with the previous feature so the users will simply build off of the site they just created. It simplifies the ways to implement different versions of view for different devices.