This is called synchronous rotation. In the distant past, Earth’s gravity gradually slowed the Moon’s spin until its movement settled into a stable rhythm. As it travels around its orbit, the Moon therefore turns by exactly the amount needed to show us its familiar side again.
You can demonstrate this at home. Place an object in the centre of a room and walk around it while keeping your face turned towards it. You will complete a full circle and rotate once around your own axis at the same time.
The Moon’s far side is sometimes mistakenly called the dark side, but sunlight reaches it as well. Day and night alternate on both sides; we simply cannot see most of the opposite hemisphere from Earth.
The Moon also rocks slightly along its orbit, so over time observers can see a little more than half of its surface.
The cosmos can turn complex mechanics into remarkably beautiful synchrony.
The stars speak. You decide.