Have you ever struggled to make sense of a message because its author didn't write clearly? It's possible your writing was cluttered with filler. Just like a desk littered with too much stuff, untidy writing can make it hard for your reader to find what they're looking for.
“Any profession has its jargon… I can’t bear it. I don’t even like legal Latin. If you can say it in plain English, you should.” - Ruth Bader Ginsburg, U.S. Supreme Court Justice