What to consider when shopping for a computer monitor Computer monitors are the devices used to output the display from your Apple computer or PC and come in a huge variety of sizes, types and specialisations. These monitors can range from gaming-focused displays, with 4K resolutions and higher refresh rates for more precision, to office-oriented monitors that forego some of the later technologies for the sake of affordability and reliability. A wide range of manufacturers produce monitors, such as Dell, LG, and Samsung, and each tends to specialise in a certain field moreso than others, and while there are plenty of premium brands out there, sometimes the lesser-known alternatives can offer far greater value.