What is the number of pixels that describe an image and establish its detail?

The number of pixels in an image, often referred to as its resolution, is determined by multiplying the width and height in pixels (e.g., 1920x1080). Higher pixel counts generally result in greater detail and clarity, as more pixels can represent finer nuances of the image. However, other factors like pixel density (PPI or DPI) and image quality also play significant roles in the perceived detail. Thus, while pixel count is important, it is not the sole determinant of image quality.