The flaps are located on the trailing edge of the wing between the fuselage and ailerons. They slide down to increase lift on a wing. When in their fully extended position, their angle and added surface area contributes to the downward airflow to help increase lift under Newton's Third Law. The flaps on both sides rise and fall. This allows extra lift produced to be equally on both wings.
The slats are located on the leading edge of the wing, and increase the surface area allowing the wing to produce more lift. Flaps and slats increase a wing's surface area and direct air downward to produced extra lift for the aircraft.
Flaps and slats also increase drag on an aircraft, therefore, flaps and slats can also be used as brakes to help the aircraft slow down for landing. Since they help produce more lift, they enable a plane to fly at lower airspeeds. Flaps and slats are also used during takeoff because the extra lift they produce helps an airplane to takeoff in shorter distances. The flaps and slats are controlled by levers in the cockpit that can be set at different settings to adjust the amount of flaps and slats extended.
