We want to live our domain. We want to eat it, to consume it. Most of all, we want to share this language from user to code.
This is the ubiquitous language.
It is free from ambiguity. We talk about these things. In our codebase, we find classes and objects named after these things. The ubiquitous language, the language we all use, eliminates impedance... it puts us all on the same key... it is all how we get along