Do you need an Advertising Agency in Pittsburgh, PA? LocalSpark has searched for the top marketing businesses in Pittsburgh. In the current aggressive market, it is important to seek out an expert advertising agency if you want to remain competitive. Advertising agencies help their clients with search engine optimization, PPC, web design, graphics, social media, and additional digital marketing strategies that improve your business’ online image and outreach. Below, we have organized a list of the best Pittsburgh, PA, Advertising Agencies.