Do we write effectively? We want to get our message across with as little fuss as possible; clear, concise writing that doesn’t want to impress with big words jargon. Less really is more.
A good resume is a study in efficiency. Employers have hundreds to wade through, and long ones are likely to get deep-sixed before they see the light of day. Writing for business is the same: a million things compete for our readers’ attention, and they’re less likely to read things with excess verbiage. We run the risk of either boring our audience, or overwhelming them with so much detail that it’s just too much trouble to wade through.
There are plenty of books on this. One of the classics is On Writing Well by William Zinsser. In the meantime, I found this excellent post by Mark Murnahan on effective writing. Check it out!