Jupiter represents expansion and confidence: what makes you grow, believe in the future, and seek meaning. The sign it occupies describes a style of optimism — generous and expansive, thoughtful and measured, or any other nuance depending on the sign.
Jupiter is often associated with luck, but more precisely with momentum: it pushes you to think big, to dare more than caution alone would advise.
Domicile: Sagittarius and Pisces. Exaltation: Cancer. Detriment: Gemini and Virgo. Fall: Capricorn. Jupiter is a diurnal planet — its sect strength is at its peak in a chart born by day.
Jupiter finds its joy in the 11th house (future plans, friendships, hopes).