This is two regular monitors side by side but without the bezel down the middle. The 34-inch curved screen gives you tons of horizontal space — useful for keeping a spreadsheet and email open at once, or getting more peripheral vision in games that support ultrawide. The curve wraps around you a bit, which helps when the screen is this wide.
The 135Hz refresh (how smooth motion looks) and 1-millisecond response make it fast enough for gaming, and the VA panel means dark scenes look properly dark instead of washed out. Colors won't match an expensive color-accurate screen, but they're fine for everyday use. The HDR label doesn't mean much here — it's basically a regular bright screen.
Be aware that not every game handles ultrawide perfectly. Some will show black bars on the sides, and a few competitive games force you back to 16:9 to keep things fair.