1080p refers to a high-definition video resolution of 1920 pixels horizontally by 1080 pixels vertically, providing a clear and detailed picture quality. The 'p' stands for 'progressive scan', meaning that each frame is drawn sequentially, enhancing motion smoothness and clarity compared to interlaced formats. This resolution is a standard for digital televisions and high-definition content, playing a significant role in improving viewer experience with sharper images.