When you Read Like a Writer (RLW) you work to identify some of the choices the author made so that you can better understand how such choices might arise in your own writing. The idea is to carefully examine the things you read, looking at the writerly techniques in the text in order to decide if you might want to adopt similar (or the same) techniques in your writing.
When you are reading like a writer. You also notice things and fix things as you are reading though it. So I think that this would be helpful to someone like who is new or something because this would have been really handy and helpful to me in the beginning as I first started it.