Revision means taking a piece of writing that you have possibly turned in for a grade and fixing any errors or adding any extra points. Revision is all about making your piece of writing even stronger. I usually revise my piece of writing as I go along, rather than a big revision process at the end. I revise in order to make my piece of writing better and also to bring up my grade if my teacher allows revisions. Not everyone does revise, but it is very beneficial.