【How-to】What does 720p mean - Howto.org

Typically, the more pixels there are, the better and clearer the image will appear. Most TVs these days are 1080p, or what’s called “Full HD.” These have a resolution of 1920×1080, and they’ll put out a good picture at a great price. If you want the best, though, you want a 4K or “Ultra HD” TVs.