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 Jupiter dasha lasts 16 years. While you are in it, Jupiter's themes colour those years. Your chart page in Vedic mode shows which dasha you are in now, with dates.
Themes
The Jupiter period lasts sixteen years and usually favours learning, teaching, faith, family growth and expansion. Mentors may appear, and opportunities often arrive through good conduct. Many people describe it as a period when life feels more meaningful and their sense of direction becomes clearer.
What it supports
Education, spiritual life, children and family, generosity, ethical leadership and long-term growth.
What it asks of you
Jupiter asks you to grow wisely, not merely bigger. Share what you learn and stay humble as blessings arrive.