How is the new jersey plan important?

The New Jersey Plan was important because it was one of two major plans (along with the Virginia Plan) made to determine representation in the US legislature. Finally, the Great Compromise settled the issue of representation in the legislature in that called for two houses in the legislature: the Senate and the House of Representatives, with the Senate having a set number of representatives per state (which favored the smaller states), and the House having representatives based on state population size (which favored the larger states).