Literacy matters in business and at work. People who notice your errors will rarely correct you, but they will always judge you.
Poor spelling, incorrect grammar, lousy writing and poor oral presentation are all signs of illiteracy. I don’t care what field you work in, how much you earn, or whether you’re a production worker or a vice president. The way you use language reveals who you are, how you think, and how you work. And that will affect your career profoundly. You can pretend otherwise, but you can also walk around buck-naked believing you’re invisible because you’ve got your eyes closed.