You see clearly what money actually belongs to the store
Before, you took in money from sales and paid out store bills, personal purchases, and withdrawals with no rule behind them, until the separation helped you see what belongs to the store's cash and what already went to your personal use. That cuts the feeling that you "sell but never keep anything," without demanding complicated tracking from day one.
You feel less confused when paying suppliers
When you mix everything together, you risk letting a personal purchase eat into the money meant to restock inventory. With an account or wallet dedicated to the store, you know better how much you have on hand for stock, packaging, delivery, and other business costs. That helps you avoid deciding blind when it's time to buy more product.
You gain more control over your own pay
Without owner pay, you withdraw money on impulse or by whatever the day demands. With an agreed amount, you start pulling money out more predictably and can tell when you're taking out more than the store can handle. The practical gain is fewer cash surprises and a base you can adjust over time.
You keep an easier conversation about money going
When the rule is simple, you don't need a perfect spreadsheet to get started. You know where sales land, where store spending comes from, and when your withdrawal happens. That makes the routine easier to repeat, even if someone else in the family helps with sales, buying, or the register.