480p refers to a video resolution of 720 pixels wide by 480 pixels tall. It is part of the standard definition (SD) category and is commonly used for DVDs and some online streaming services. The "p" stands for "progressive scan," meaning that each frame of video is drawn in a single pass, providing smoother motion compared to interlaced formats. While 480p is lower in quality compared to high-definition (HD) resolutions like 720p or 1080p, it is still suitable for smaller screens or slower internet connections. Many older televisions and devices support this resolution, making it a popular choice for legacy content and applications.