Use [RTINGS.com](https://www.rtings.com/monitor "https://www.rtings.com/monitor"), they have measured data for hundreds of monitors and they tend to explain the more technical bits.

other websites with harder to parse info: 
- [LesNumeriques (French)](https://www.lesnumeriques.com/moniteur-ecran-lcd.html)
- [TFT Central](https://tftcentral.co.uk/category/reviews)

**if you care about gaming:**
- Look for decent refresh rate (120hz and up)
- Look for Variable Refresh Rate
  - Freesync is almost everywhere in gaming monitors, G-SYNC is a nice premium
- Response Time and Input Lag should be low (less than 10ms would be nice)

**if you care about good picture quality:**
- Look for NATIVE contrast ratio
	- at least 1000:1, 1500:1 or up recommended
- Look for the Pre-calibration Color dE
  - anything more than 5 is garbage, less than 2 is great, less than 1 is pro-grade
- (Extra) Look for HDR and color depth (windows support for 10bits kinda sucks tho)

**in any case:**
- Make sure it's Flicker-free (no PWM in backlight)
- VESA (Wall Mount) is a nice extra if you want to get monitor arms in the future
- Always shop for the exact model number, monitor brands pull stupid stunts where different sizes or model names are completely different.