4K resolution, also known as Ultra HD (UHD), refers to a display resolution of 3840 x 2160 pixels. This results in a much higher pixel density compared to traditional HD (1280 x 720 pixels) or Full HD (1920 x 1080 pixels). The increased resolution provides a more detailed and lifelike image, making it ideal for applications where image quality is paramount.
If you're interested in working with 4K content, here are some best practices to keep in mind: fc2ppv3061625 4k link