In simple words
In Vedic astrology your life moves through nine long chapters called dashas, always in the same order. Which one you start in depends on your Moon at birth.
The Moon dasha lasts 10 years. While you are in it, Moon's themes colour those years. Your chart page in Vedic mode shows which dasha you are in now, with dates.
Themes
The Moon period lasts ten years and centres on emotional life, family, home and the public. Your moods, needs and relationships with nurturing figures become important. Life may involve more change and travel than usual.
What it supports
Caring for others, home-building, public-facing work, emotional growth and creative imagination.
What it asks of you
The Moon asks you to honour your feelings without being ruled by them. Build steady routines that comfort you through the tides.