i think the only purpose of essays is for the writer to have a better understanding of what is going on. maybe also for them to know how to write an essay. im not a big fan of them but i can do them. if i can choose the topic that i write on it makes it much easier for me. however if i dont like the topic that i have to write on, it makes the writing much harder for me. in my own opinion, i dont really like essays and sometimes i think they are a waster of my time.