People often spend more money than they realize. If you don’t have a budget and you aren’t tracking your spending, you might be spending more per month than you intend. Budgeting your money and your expenses will ensure you are only spending the money you have.
People who budget often track how much money they have coming in and then they will keep a list of how much money they spend every month. You can then put whatever you have leftover into savings or an emergency fund.