Is every word important?

Not only that, every sentence and every paragraph. The first few draft of a project, we write like we talk. For some, that might suffice, some people's talk is meaningful and compact. One of the joys of writing is tightening what you've already written. It amazes me how many different ways a sentence can be phrased. The challenge is keeping it real. Every paragraph has a sentence, and every sentence has words, so how important is every word you write? I suspect, pretty important. If three wor...