High-definition (HD) refers to a resolution that provides a clearer and more detailed picture than standard definition (SD). HD typically includes resolutions such as 720p (1280x720 pixels) and 1080p (1920x1080 pixels), which enhance the viewing experience for movies, television shows, and video games. This improved clarity is especially noticeable on larger screens. The term HD is commonly associated with various devices, including televisions, monitors, and projectors. Many streaming services, such as Netflix and YouTube, offer content in HD to meet consumer demand for better visual quality. As technology advances, higher resolutions like 4K and 8K are becoming more popular.