Unless you have a retrograde Jupiter in your natal chart, you won't really feel the effects. However, we will all feel the energy of Jupiter in Scorpio. Scorpio is a water sign but it is more like a still water and less movable than Cancer. Jupiter is all about expansion and making things bigger, optimism and luck. Scorpio is inward and secretive and all about hidden things as well as occult sciences and mysticism. Scorpio is ruled by Mars. Jupiter and Mars are friendly to each other and Mars sees Jupiter as its good luck charm. When focused on positive energies, Jupiter will guide Mars and create a path towards spiritual awareness. If you are not careful, Jupiter can exaggerate the fiery energy of Mars and could take you down a path of anger and negativity. Staying focused and aware of what lessons the universe is trying to teach you will keep you from going down that path of destruction.
If you have a natal retrograde Jupiter, this will be a great time for clearing your karmic debt. Depending on the strength of the house this transit is occurring will determine how difficult this karmic clearing will be. Based on the system of Ashtakavarga, the planets give each house a score of points. If Jupiter is transiting your 10th house and gives it 5 - 8 points, this will be an easier time vs. 4 or less points regarding your career and reputation. If transiting your 4th house, the karmic clearing will be based around the themes of the 4th house: home, mother, land, property, nourishment etc.
Find out where Jupiter is placed in your Natal chart and your Ashtakavarga scores with a natal chart & report from lunarpersuasion.com