Answer:
Step-by-step explanation:
Which kind of money? Do you mean something physical like houses, oil, gold, silver or do you mean Ben Franklin's.
If you mean paper money, eventually it turns out to be useless -- especially when backed by nothing. Eventually governments (who are usually the only people who can print money), see a need to debase a currency for social benefits or wars -- take your pick.
If you are talking about real assets like Gold or Silver or real estate, then the function of money is to accumulate and hold wealth. It can take a whole lifetime to learn this and how to do it.
At the level you are asking about, I think the main function of money is to buy things, to exchange paper for goods services food transportation and/or a place to live. I do your taxes for you. You rewire my house for me. It's what we use to barter what we have.