How does Jupiter affects you? What is it for?

Jupiter guides you to high ideals, a sense of purpose and what will bring you happiness. Jupiter determines whether your life journey will be smooth or rocky, whether you'll be stingy or generous, and your overall level of optimism.

Jupiter in Leo attracts luck when they are generous and inspire others around them. They need to present themselves with dignity and sincerity, and try very hard to not let their ego get in the way. They prosper when they can be creative, such as in the entertainment field, or working with children or recreation.

Jupiter in Leo has strong opinions and beliefs. They can take it personally when others disagree with them. They are good at making their own opportunities and they do best when taking calculated risks confidently. They are drawn to interesting people, and can be quite memorable themselves.

Leo Jupiter must have a way to play. Holidays, romance and celebrations renew their spirit. They may have talents in the arts, drama, teaching or as a community leader. They shine when they are the center of attention, and come across as confident and cultivated. They are optimistic and enjoy a healthy constitution. They love to show off their status and wealth. People trust them.

Leo Jupiter may gamble too much, or be offended if they are not automatically accorded the respect and admiration which they feel they deserve. They can be a bit melodramatic and play to the audience a bit much, but this is why so many people love them. Their charisma brings them good fortune. The enthusiasm they show attracts success and attention wherever they go. Rejection just rolls off of them. They may tend to exaggerate.

Dignified and honest, Jupiter in Leo needs honor and social status to feel self-worth. Social importance means a lot to them. They have a good sense of humor. They are open to exploring new things. They are self-reliant, courageous and full of vitality. On the other hand, they may become extravagant, ostentatious and self-centered. They may make rash judgments. If they don't watch their weight, they may have issues with the heart.

Jupiter gives a drive for expansion in ourselves and could bring "success" in life - success can mean different things to different people. Used well it can bring prosperity; used poorly it can bring excesses into our life. Key words for Jupiter are expansion and inspiration. Jupiter in Leo is about the expansion of Leo concepts - pride and vanity maybe if poorly used but maybe great dignity and self confidence if used well. Jupiter is at home in the 9th house but a lot depends on the aspects it makes to other planets. Well aspected Jupiter here can give meaning to things that happen in your life; things that other people may see differently to you as you have the ability to make sense of any events etc - Jupiter makes use of what you learn, (Mercury and the 3rd house). If poorly aspected Jupiter here could be about "a little knowledge being dangerous". You may think you have the answer to everything when in fact you're making mountains out of molehills - it may be hard for you to use knowledge practically. A well aspected Jupiter here could make a very good teacher because of an ability to inspire other people.

Edit: as the question isn't closed I can edit it; I can't "comment" on any question though - don't know why?

Is Pluto also square to Venus? If it is it's a t-square and is strong when you learn to work with it.

Venus in your 3rd can give a love of learning, or education and being able to communicate in a charming sort of way but it may be that it's important for you to be seen as charming, if that makes sense?

The opposition of Jupiter and the square from Pluto especially can show rivalry, jealousy maybe or just arguments because of competition in general between you and any siblings you have. If Pluto "is" square to Jupiter as well then look at the sign and house opposite Pluto; this is what may be you have to try to learn about because this will help you with any problems you have with Jupiter, Venus and Pluto.

With Mercury conjunct Uranus you're likely to make snap decisions; you could have been a bit of a rebel at school and the inconjunct to Mars, your thought processes are likely to bring you a sort of inner turmoil which you can't quite put your finger on or figure out why you do some things the way you do. Sibling rivalry is also quite likely with your Mercury aspects, (if you have any siblings).

Nothing's bad though in a chart. If you know about it you can do something about it for sure.