>>1903416as other guy said, it ensures that your nose remains inline with the turn. you press down on the rudder in the same direction of the turn, so if you're making a left turn you want left rudder, and vice versa for right turns. in the cockpit you should have either a turn and slip indicator(the one with the needle) or a turn coordinator(the one with the plane outline)
for the purpose of coordinated turns, you should be trying to get the ball in the middle, between the lines. if the ball is to the inside of turn(with the needle/plane), that means you are in a slip. if the ball is to the outside of the turn(away from the needle/plane) you are in a skid. hope this helps
>>1903437most stall induced accidents happen on the turn to final, when pilots overcompensate and turn too steep or use too much rudder, and end up skidding trying to line up their approach. generally you should never go past 30 degree bank angle for this turn and be mindful of how much rudder you are putting in.
