Your Moon Sign [i.e., the placement the Moon in your birth chart] describes your instinctive or emotional energies, your innate reactions, and the things you need to feel comfortable or secure. It can reveal your emotional, genetic and intuitive makeup.

Whilst the Sun Sign describes qualities you are learning to develop and become, your Moon sign describes who you already are.

​

"If the Sun is a husband, the Moon will be the wife, and they will remain in a contract of giving light and reacting to it until the end of time, from our perspective on Earth. In general, this is the spot of reactivity we all carry within, and if we see a troubled Moon, reactions to outer experiences will be obviously inappropriate, deep beyond our recognition or ability to metabolize, hurtful, or in the greatest challenge of all - simply missing. A world without emotion seems to be the biggest punishment for our Soul. [...] Positive aspects - and a strong Moon set in Taurus or Cancer - often speak of healthy reactivity and emotion we easily recognize and incorporate into our lives and our relationships. Strength of our Moon makes us capable to summon things we need, including love, into our lives. It is our ability to recognize our feelings and act accordingly, accepting them, embracing our soft side, while dealing with daily matters through passive, positive existence and ease." 

​

-- Read more at https://www.astrology-zodiac-signs.com/astrology/planets/moon