4K Ultra HD refers to a display resolution of approximately 3840 x 2160 pixels, which is four times the resolution of Full HD (1920 x 1080 pixels). This higher pixel count allows for more detailed and sharper images, making it ideal for large screens and immersive viewing experiences. In addition to improved resolution, 4K Ultra HD often supports enhanced color depth and contrast, providing a more vibrant and lifelike picture. Many modern devices, including televisions, monitors, and streaming services, now offer content in 4K Ultra HD, making it increasingly popular among consumers seeking high-quality visuals.