Moon sextile Venus is an aspect where the Moon and Venus sit roughly 60 degrees apart in your birth chart. The Moon is your inner weather: what you need to feel safe, and how you react before you think. Venus is what you love and how, covering taste, pleasure, attraction and what you value. When they form a sextile, those two parts of you are in easy conversation. They come from signs whose elements work well together, fire with air or earth with water, so the emotional need and the loving impulse pull in roughly the same direction rather than fighting.
Spisce counts this aspect when the Moon and Venus are within 5 degrees of each other; the closer they sit to exactly 60 degrees apart, the more clearly this shows in a life.