Answer:
The illuminated side is called the near side of the moon, while the one that we can't see is called the far side of the moon.
Step-by-step explanation:
Moon is rotating on its axis at the same time rate that it takes it to go around the Earth. Because of this phenomenon called tidal locking, we are able to see only one side of the moon at all times, while the other stays invisible from the Earth.
The side of the moon that is visible from the earth is called the near side of the moon. We can see around 59% of the moon’s surface from the Earth in total.
The side that can’t be seen from the Earth is called the far side of the moon, or also the dark side of the moon.