Do you need an Advertising Agency in San Bernardino, CA? LocalSpark has found the top marketing agencies near San Bernardino. In today’s aggressive marketplace, it’s important to seek out an expert advertising agency if you want to be competitive. Advertising agencies help their clients with targeted search marketing, PPC, design, social media, web development, and additional digital marketing strategies that improve your company’s success. Below, we have organized a list of the best San Bernardino, CA, Advertising Agencies.