Like as mentioned above about pixel resolution, the pixel pitch can be considered as an important parameter for the effective viewing experience. The pixel pitch becomes the distance between each LED cluster that makes the pixel and the amount of pixel pitch becomes the ardent factor for the costing of the LED screen.
One can say that if the pixel pitches are small it caters to the less audience and greater the pixel pitches, more the visibility to the vast audience. Furthermore, you can probably increase the pixel pitch depending upon the readability of the audience over the contents which is being fed onto it.