During the Constitutional Convention, a major problem of how representation was going to be counted was being debated. The bigger states and the smaller states wanted different things, along with the fact that slavery also had to be accounted for.
The New Jersey Plan was supported by the smaller states who had a lesser population. They believed that it was not fair that they should get less representation just because they had less of a population. They believed in the New Jersey Plan, which gave equal representation in the government.
The Virginia Plan was supported by the larger states who had a greater population. They believed that it was not fair that they should get the same amount of representation as states with a smaller population. They believed in the Virginia Plan, which gave representation based on population.
The Great Compromise was a compromise between the larger and smaller states. The Great Compromise created a bicameral legislature, along with the House of Representatives, which we still use today. The representation in the House of Representatives was assigned based on population and the representation in the Senate was given equal representation. This compromise made both the large and smaller states happy.