Which component of a computer is essential for displaying information visually?

The monitor is the essential component for visually displaying information on a computer. Its primary function is to convert the digital signals generated by the computer into visual output that users can see. This visual output can include everything from the operating system's interface to graphics, videos, and text.

While the CPU processes information and the motherboard connects all components, they do not directly contribute to visual display. The keyboard, on the other hand, is used for inputting data rather than displaying information. Thus, the monitor plays a crucial role in enabling users to interact with the computer through visual output.