Jupiter is the planet of growth, faith, teachers and good fortune. Taurus is a fixed earth sign ruled by Venus: money, land, goods, food and comfort. Venus and Jupiter are not friends in the tradition, the two great benefics having different ideas of what is good, so Jupiter's breadth here is spent on material things.
The theme is abundance made tangible. Markets, harvests and wealth grow. So does spending. The lesson is that plenty is a teacher too: it asks what is worth having, and what only looks like it.