Edit: Totally redone since people seem to think I’m completely stupid or something.
How do you tell the difference between closely related genres? For example, I saw an artist listed as “pop, bubblegum pop, indie pop, pop punk, electropop” and I don’t understand how those are all different genres. Or you have rock, punk rock, grunge rock, and alternative rock. Like what themes or instruments or whatever defines these genres and makes them not the same as all the others?