What is the Haber process? What are the optimal conditions for the reaction and why are they not used in practice?

The Haber process is a reaction of burning Nitrogen and Hydrogen to make NH3.The formula is 2N2 + 3H2 - 2 NH3. The reaction is reversible.The forward reaction is exothermic so when the temperature is increase, the requilibrium shifts to the left and the yield decreases. For a high yield, it is best for the reaction to be run at a low temperature but this slows down the rate of reaction. In practice, the temperature is set to balence so the most NH3 is produced per time.