1080p HD refers to a high-definition video resolution of 1920x1080 pixels. The "1080" indicates the number of horizontal lines of vertical resolution, while the "p" stands for "progressive scan," meaning that each frame is drawn in full, providing smoother motion and better image quality compared to interlaced formats. This resolution is commonly used in various media, including televisions, computer monitors, and streaming services. It offers a clear and detailed picture, making it ideal for watching movies, playing video games, and enjoying high-quality content.