Box Blur is a simple image processing technique used to soften images by averaging the colors of nearby pixels. It works by replacing each pixel's color with the average color of its surrounding pixels within a defined square area, or "box." This results in a blurred effect that reduces detail and noise in the image. The process is often used in graphic design and photography to create a dreamy or smooth appearance. Box Blur is computationally efficient, making it suitable for real-time applications, such as video processing and rendering in computer graphics.