In digital imaging, a pixel is the smallest unit of a digital image, representing a single point in a rasterized image. Pixels form the grid that builds up the overall picture, with their color and brightness contributing to the final output. Higher pixel density results in sharper images, making pixel count crucial for print and display quality. Each pixel's characteristics are manipulated during the editing process, influencing how images are rendered across different devices. Understanding pixels is fundamental to optimizing digital visuals for various applications, including photography, graphic design, and digital media.