Are details and examples compulsory for our essays?/

I’m confused! Do we have to or must offer details and examples to support our essays? I don’t know about that.
Does score of a essay with some details or examples higher than essays don’t ?

TOEFL listening discussions: What will the student try to do with his next essay?

I think they’re necessary but not compulsory as you’ve said because when you try to do something you don’t really get its purpose, then it will make your essays unnatural or even misunderstandable.