ELI5: Explain Like I'm 5

Use Case

A use case is like playing with toys. Just like how you have different toys for different games, a use case shows different ways something can be used. For example, a phone can be used to make calls, send texts, take pictures, and play games. These are all different use cases for a phone. Use cases help people understand how something works in different scenarios, just like how different toys can be used to play different games.