There are many media to market your product nowadays, some are free, the others might be quite expensive. That is not necessarily determines your marketing success. The point is that you have to choose the right media for your product, so it will cost you effectively and it is direct to your target customers. As I read in a marketing article, the most important thing you have to prepare in every media is your message. There are also description and guidelines to choose among some commonly-used media. The article provides you with some comparison, which one might work better, and how your target customers might react to the media. They help you to make decision. Read here.