You can know the name of a bird in all the languages of the world, but when you’re finished, you’ll know absolutely nothing whatever about the bird …
So let’s look at the bird and see what it’s doing — that’s what counts.
I learned very early the difference between knowing the name of something and knowing something.
~ Richard Feynman, physicist, 1918-1988
The same is true with services. There is a difference in being able to point at a service, or defining and describing it, and knowing the services, especially why it is.