Budget
A plan for where your money goes before it goes there. The popular 50/30/20 version sends roughly half of take-home pay to needs, 30% to wants and 20% to saving or paying down debt — the point isn't precision, it's that every euro has a job.
Where this is taught
Definitions are the trailer. These free levels turn Budget into something you play — one bite-size lesson, with worked examples, a quiz and XP.