ELI5: Explain Like I'm 5

Simplicity

Simplicity is all about making things as easy to use, understand, and remember as possible. For example, if you have a sandwich with too many different types of condiments and ingredients, it might be hard to remember which ingredients are inside the sandwich. But if you make a sandwich with just a few ingredients--like peanut butter and jelly--then it is really simple to remember what's inside the sandwich and to make the sandwich too!