Do you need an Advertising Agency in Oakland, CA? LocalSpark has searched for the top web and digital marketing companies in Oakland. In the current aggressive market, it is important to seek out a professional advertising agency if your company wants to be competitive. Advertising agencies help clients with search engine optimization, PPC, web design, graphics, social media, and additional digital marketing strategies that bolster your company’s success. Here, we’ve organized a list of the best Oakland, CA, Advertising Agencies.