What does it mean for the Moon to be tidally locked with Earth?

When the Moon is said to be tidally locked with Earth, it means that the Moon's rotation period is the same as its orbital period around Earth. As a result, the same side of the Moon always faces the Earth. This phenomenon occurs due to gravitational interactions between the Earth and the Moon over a long period, which have caused the Moon's rotation to synchronize with its orbit.

The tidal forces exerted by Earth create a bulging effect on the Moon, and over time, this has led to the slowing down of the Moon's rotation until it matched the time it takes to orbit Earth. Therefore, as the Moon revolves around Earth, we only see one hemisphere of the Moon from our viewpoint, while the far side remains hidden.

This presence of a stable face-presentation has significant implications in various fields of study, including geology and lunar observation, as it limits our direct observation and study of the Moon's far side.