Keep your emails and communications as short as possible.
Make sure you cover everything you absolutely need to, but nothing more. When an email is too long, people won’t read it. Don’t believe me? Think about your own habits. When you see a wall of text, what do you do? If you’re the type to dig in and read, realize you are an exception.
Seth Godin wrote that the tl;dr reason is foolish. His point is one can’t judge quality by length. He is 100% correct. However, most people do. If you want your emails and communications read, keep them short and to the point. The shorter the better while still communicating what you need to get across.