Peer-Editing

In class couple of days ago I got my paper read by the whole class. I was scared because I'm not a good writer and I wrote the paper in a rush so. When I got to class I talked about my paper to two groups and one group ripped my paper up and it was all negative comments and the other group had comments but they also help give me ideas that i would need to expand my paper. I got a lot of useful advice that I'll use for my paper. At first I never understood why we had to do it because it would be a waste of time but I see that's actually helpful and a good idea that we do this in class.