A resolution higher, such as 4K will provide a higher picture for avid gaming but will of course require a better specification of hardware to avoid jittery performance.
A minimum of 144Hz ensures smooth gameplay, and it's greater when you have a higher refresh rate, such as 240Hz, for competitive games to eliminate lag and give you seamless access.
The reduction of response time to as low as 1ms helps in reducing motion blur and ghosting and is integral for quick gaming, providing more clarity in the display.
Monitor size will depend on the space you have in your gaming area or simply the preference of the gamer. Ultrawide monitors provide an immersive experience, with the game environment being broader and enhancing the gameplay with a wider scope.
IPS panels are known for better color accuracy and wider viewing angles, ideal for immersive gameplay whereas TN panels offer a fast response time, making them ideal for competitive gamers.
Reduce screen tearing and stutter; instead, look for features such as G-Sync or FreeSync to make the experience smoother and smoother by syncing the refresh rate of your monitor with the GPU.
Adjustable stands on the monitor, VESA mount compatibility, and extra ports make them more comfortable, connected, and enhance the overall gaming setup, thus improving the gaming experience.