Jupiter symbolizes all things benevolent, optimism the giver of gifts. Sun has much the same meaning, but with more static quality, and also symbolizing your deep motivation in life.
If together (conjunction) in a person’s birth chart, the two together describe a generous person who continuously gives to others He or she is usually a person people seek out, because they have the gift of uplifting others and seeing the best in situations and people.
How this comes out depends on the sign: in the earth signs Taurus, Virgo, and Capricorn, gifts of the more tangible kind are likely.
In the fire signs Aries, Leo, and Sagittarius, the gifts of enthusiasm and fun dominate.
The water signs Cancer, Scorpio, and Pisces will make the person intuitive, emotional and caring.
And in the air signs Gemini, Libra, and Aquarius, gifts take the form of encouraging communication, and uplifting ideas.