Astrologically speaking, most people know their Sun signs. They’ll say “I’m a Leo” or “I’m a water sign” or “I was born on the Virgo/Libra cusp.”
Many think that’s all there is to it, but nothing could be further from the truth! The Moon sign is not only as important as the Sun sign, it’s often even moreso.
Eastern astrologers, for example, are more interested in Moon signs than Sun signs, and in many areas almost everyone knows their own Moon sign from an early age.