The statement is - True.
The phases of the Moon, the way we see them, depend on how much of the lighted side of the Moon can be seen from the Earth. That also depends on the Moon's position towards the Sun, as the light from the Sun is what makes part of it lighted.
The Moon is always half bright and half dark. But the position in which it is towards the Earth dictates how much of the bright side can be seen, so we can sometimes see it as lighted only very little, sometimes as half lighted, and sometimes as totally lighted. This cycle lasts for almost a month, or to be more precise, it last 28 days.
