Do you need a Marketing Consultant in St. Louis, MO? LocalSpark has analyzed the top digital marketing agencies in St. Louis. In the current aggressive market, it is important to hire an experienced marketing consultant or agency if your company wants to be competitive. Marketing consultants help clients with search engine optimization, web design, branding, logos, print materials, and various other projects that revitalize your business’ image and reputation. Below, we have put together a list of the best St. Louis, MO, Marketing Consultants.