Online marketing has become a melting pot for media, combining search engine optimization, paid search, social, display advertising, attribution, and more into one strategy. Why? One medium doesn't work as well as a strategically well-culled combination. Understanding this concept, The Rimm-Kaufman Group (RKG), mostly known for its expertise in paid search marketing, said Thursday it has acquired Bend, Ore.-based AudetteMedia, which focuses on search engine optimization (SEO). All employees of AudetteMedia will join the staff of RKG.