Cole's clauses and phrases stuff

What does a phrase do? Describes/adds detail to make sentence better
What is a clause made up of? The subject +predicate
What is the subject of a sentence? Who/what the sentence is about
What is the predicate? What the subject is doing

5 phrases
1. In my studio
2. Down the slide
3. Up the elevator
4. Like a vacuum
5. By the tank

5 clauses
1. Chad kicked
2. Cole threw
3. H.I.M. rocked
4. Dillon sang
5. Nickell crashed

5 sentences
1. Nickell crashed into the door knocking out his teeth.
2. H.I.M. rocked in my studio.
3. Chad kicked down the slide.
4. Dillon sang all the way up the elevator.
5. Cole threw the ball into the horizon.

Why is it beneficial for writers to understand phrases and clauses? It is beneficial because if they write correctly they would seem smart. I don’t find it that important but people are picky.