The thing about the written word is, you can plainly see it.
If you’re having a verbal conversation with someone, they aren’t seeing the spelling, grammar or structure of what you’re saying; none of it really matters in that case. When something is being read, however, that something is both seen and judged.
Knowledge is power, and always will be.
The thing about knowledge when it comes to promotion, though, is it still has to be executed well. Having the skills is obviously key, but if what you’re doing is missing the mark because your target audience can’t quite relate, you’re hurting yourself.