A pixel, also known as an invisible image, is the smallest unit of a digital image or display that can be individually controlled and manipulated. It is a tiny, square-shaped dot that contains a specific color and brightness value, and when combined with other pixels, creates the images we see on our screens. These invisible images are essential in creating high-quality graphics and visuals, and their precise placement and color contribute to the overall clarity and resolution of an image. Without pixels, our digital world would lack the vibrant and detailed images that we have come to expect.