Read this article titled: 5 Common Self-Publishing Mistakes that Stamp Unprofessional on Your Book and How to Correct Them.
Funny how the article's author didn't seem to follow Number 3: Book Control. I take that to mean editing and proofreading, so let's play: How illiterate is this article? And yes, in case you are wondering, this came over my news feed; I shit you not.
Sometimes I think this stuff is deliberately posted to perpetuate the stigma and reinforce the belief that all self-published books are illiterate crap. Yes, if I was a conspiracy theorist, I might believe that, because nobody could be this stupid.