Marketing is a HUGE industry. Especially in the work at home world. There are always companies looking to hire the next great salesperson or marketing guru, and you can even get into marketing all on your own. Work at home marketing positions are a great option for those with relevant skills who desire the flexibility of a home-based position.
Working in marketing really isn't complicated. There are degrees and training programs out there that can help you become an all-star, but you can also learn by doing, which is what a lot of companeis offer.
When I began freelancing over a year ago, I knew a little about marketing from my previous retail career of 5 1/2 years. However, I am a writer, not a business person. Still, I began working with a company that needed marketing materials done, so I was given the opportunity to try them. A few simple instructions and relevant topics were given to me, and I created the content that the company needed. And guess what? I was GOOD at it.
Marketing is all a matter of persuasion. If you can persuade people to buy your product, visit your website, or click on your links for an affiliate marketing program, you can work in marketing. Having a sales background is helpful, and so is creativity. However, these things aren't necessary, because you can pick them up as you go along. The internet really does offer a lot of great opportunities for work at home marketing positions, and you shouldn't shy away from them just because you're not a marketing genius. Everyone can learn.