As a classic example, of a P10 pixel module, if there is a 10 mm gap between pixels, one can estimate that it uses 4 times as many LEDs as a P 20 pixel module and that is the reason how pixel pitch becomes a huge impact on the pricing.
Pixel pitch predominantly affects the resolution of the screen and the optimum viewing experience by the targeted audience. However, there are two main components in LED screens which make it an essential component viz. the SMD and DIP LEDs