SEO(Search Engine Optimization) is what drives traffic, and in turn, sales and profits to any online website. While that is critical to the long-term growth of a website, social media sites such as Twitter and Facebook can also drive more traffic because word can travel fast on there. You should consider looking into social media packages for help with this to further increase traffic and maximize your profits and sales.
Every tool and enhancement that is available to you should be used if you're serious about getting your site more visible to customers as well as profitable. There are many ways to get your name and/or products out there, but without a strong SEO and social media presence, it's nearly impossible to do so. Be sure to do this and know that your site's survival and long-term are much better with those factors in place.