Thus, your essay is an attempt both to discover what comfort means for you and to communicate your discovery to the reader. This dual purpose might suggest that you write more than one draft of the essay. In general, tutors expect you to write at least one draft and make significant changes to it before mailing the essay. Some tutors ask to see your earlier drafts, and others do not. The idea is to get lots of thoughts on paper.
Revision happens after the first draft.
Revision is the act of re-seeing, of perfecting your language and ideas. Painters will go through a series of sketches to get to the final vision they want on the canvas. The same is true for writers. With each draft or revision, the writing moves closer to a final vision. Many writers save grammatical and spelling corrections for the last draft.