What does screen resolution refer to?

Screen resolution is defined by the number of pixels displayed on the screen, typically expressed in terms of width by height (e.g., 1920x1080). A higher screen resolution means more pixels are packed into the same physical space, resulting in sharper and clearer images and graphics. This clarity is crucial for various applications, including gaming, graphic design, and professional work, where precise detail is vital.

In contrast, the other options refer to different characteristics of display technology. Color depth concerns how many colors can be displayed at one time, which affects image quality but not resolution. The refresh rate relates to how many times per second the display updates its image, impacting motion smoothness rather than clarity. Finally, brightness indicates how much light the screen emits, influencing visibility in different lighting conditions but not pixel density or overall resolution. Thus, understanding screen resolution as the specification of pixel count is key to assessing display quality.