The first thing that editor does is they take out a red pen, or nowadays you go online, and they start striking things. Basically eliminating things, the biggest task of an editor is to simplify, simplify, simplify and that usually means omitting things.
Keith RaboisYou generally know when someone asks you to do something- am I more writing, or am I more editing? The editor is the best metaphor for your job.
Keith Rabois