Understanding this is a good first step to controlling expenses using nearly any resources. Think of it like this: the money on the timeline is, in fact, what you won or lost; the invoice money is the money you promised to pay on the day of the next salary.
When considering the month's expenses to do math - or fill out a spreadsheet if you're those people -, use the timeline. With a quick and clear view, you can see where the money was spent at a glance. Quickly search and find how much you spent when you ate that snack or bought that outfit.
By doing this, you understand a little of your consumption patterns. Many purchases made in the same place with recurring frequency can mean that you have a fixed expense that you didn't even suspect.
Being aware of this type of information about your own money is essential for your fincare to be done well.
Oh, and if you want to take the next step in organization, try creating virtual cards. They help to separate and better identify your expenses, increasing control and improving your financial planning.