Jupiter in Gemini is getting hit by a hopeful square to Neptune in Pisces. This is the "big promises with no substance" aspect. Sorry to burst your bubble, but there's no other way to put it. Jupiter expands possibilities, Gemini is about communication and Neptune blurs the line between fantasy and reality.
Sometimes this can be good. Creativity depends on Neptune. But when it forms a hard aspect (square), its energy challenges the truth (Gemini). Neptune in any combination with Jupiter is going to create hyper-idealism. Are you busy convincing yourself of something? Fantasy is fun, but don't get too wrapped up in the outcome. The hard-crash that follows a Neptune transit really hurts.
Between now and June 25th (when this aspect is exact) be very cautious about big promises (believing them or making them). I'm not saying that everyone is going to lie, but energy will trend towards glossing over the details. On the plus side, if you want to convince someone of something, this aspect will help you out.
Best way to deal with this transit is to check the details. If someone tells you a story, do some background research. If you're spinning something, make sure your bases are covered. If you're contemplating a new venture/project/romance, run your internal spelling and grammar check. Bet you missed something.
Those with planets between 0-3 degrees Pisces and Gemini will feel this influence most strongly.