Jupiter is in one sign for about a year. During that time, it is in one of the natal houses. If natal house is bigger or smaller, this will change transit duration. This varies for each individual. Meaning will also change whether there are planets in the house where transit is. Impact varies depending on whether there are aspects to other natal planets with transiting Jupiter, too. We have to connect all this with the sign of transiting Jupiter, but also with natal Jupiter. For anything to happen it is necessary to have at least three of the same factors. Just transiting Jupiter is not enough.