Pixel density also plays an important role in selecting a monitor. Pixel density is a number referring to the number of physical pixels per inch of the display, and the common units are Pixels-Per-Inch or PPI. For the image on the monitor to be really sharp and detailed it is recommended to have as high a pixel density as possible and so the higher the resolution the better.
Finally comes color gamut, arguably the most important aspect of a pro-grade monitor to consider. Color gamut refers to the range of colors that can be displayed. There are 3 main color gamuts that are the industry standard for creators:
Most modern electronic devices use the sRGB or standard red-green-blue color space, and it is the default for web use and most images shot with a standard consumer grade camera. Adobe RGB is a color space optimized for print applications as well as the Adobe software suite. Many photographers like to shoot in Adobe RGB for better vibrancy compared to sRGB. The Adobe RGB color space encompasses the entire range of sRGB, so most monitors with high color gamut ratings for Adobe RGB will almost certainly have full coverage of sRGB as well. The other standard worth considering is DCI-P3. It covers the entire sRGB range as well, but unlike Adobe RGB which leans towards more blue and green coverage, DCI-P3 leans more towards yellow/red coverage. Both DCI-P3 and Adobe RGB are considered to be ‘wide gamut’, and are becoming the mainstream standard for monitors these days.