Unlike traditional marketing, there are quite a few ways to start marketing online for free. Doing search engine optimization, or SEO, requires investments of only time and energy if you have a website, and all social media platforms are completely free to join. That being said, if you want to maximize your online potential, you will likely need to invest some money in professional Internet marketing. Most business owners and traditional marketers do not have extensive knowledge of SEO, PPC, and other strategies that help sites succeed in the increasingly competitive online market.