Imagine your application's business logic is a busy, high-end kitchen. You have chefs (your services and use cases) who need specific ingredients (data) to create their culinary masterpieces (features).
Now, imagine if every chef had to run to a chaotic, disorganized farm (the database) every time they needed a single ingredient. They'd have to know exactly where to find it, how to harvest it, and how to prepare it. The kitchen would grind to a halt. It would be inefficient, messy, and incredibly difficult to change anything. What if you wanted to switch from that farm to a local market?
This is where the Repository Pattern comes in.