BMP, or Bitmap, is a type of digital image file format that stores graphical data in a grid of pixels. Each pixel in a BMP file represents a specific color, allowing for detailed images. BMP files are known for their simplicity and high quality, but they can be large in size compared to other formats like JPEG or PNG. BMP files are commonly used in various applications, including graphic design and digital photography. They support different color depths, which means they can display a wide range of colors. However, due to their large file sizes, BMPs are less suitable for web use compared to more compressed formats.