As in most displays, size is a major consideration when choosing a resolution (typically the larger a display, the higher resolution you need to maintain the sharpness of an image). A higher resolution is generally recommended if you'll be working with a lot of text/data or if you want to game at high resolution, though for smaller screens FHD (1080p) is usually sufficient. If you're looking at buying a larger display, 1440p or 4K is probably a more reasonable target.