Adobe Digital Index's "Best of the Best (U.S.)" report illustrates how much brands can learn from industries outside of marketing. For instance, the retail industry has plenty to teach about social media and Web site stickiness; the financial services industry is ahead of the pack for targeting optimization; and media and entertainment lead in mobile phone visits. “I think the main point here is that brands can learn from marketers outside their industry,” says ADI principal Tamara Gaffney said.