Maintaining proper pool water level is very important. It is much more critical than you think.
Ideal pool water level is about half way of the skimmer opening.
If the water level is too high, leaves and debris on the water surface can not be skimmed into skimmer causingdirty look of your pool.
Low water level causes much more problems and it could be critical. If the water level is too low, your pool pump will sucks in the air. It makesthe pump loose it's primeand causes lack of pool water circulation.