Do you need a Marketing Agency in St. Petersburg, FL? LocalSpark has found the best digital marketing agencies near St. Petersburg. In the current aggressive market, it’s critical to find a professional marketing agency if you want to stay at the top of the competition. Marketing agencies help clients with search engine optimization, web design, branding, logos, print materials, and various other projects that boost your business’ image and reputation. Below, we’ve organized a list of the best St. Petersburg, FL, Marketing Agencies.