4. Mobile maximizes relevance. The average person checks his or her mobile phone up to 150 times per day, according to various reports. That makes mobile phones an ideal conduit to consumer preferences for driving highly personalized offers and interactions, rather than one-size-fits-all mass marketing. Furthermore, retailers are increasingly upping the ante, giving consumers the option of taking that personalization to the next level. These services can be used for geo-marketing, in which offers are made more relevant by including location context - e.g., pushing a text offer to an opted-in customer walking near a company's retail store. Paired with customer preference data in real time, geo-marketing is an important ingredient in optimizing the customer shopping experience via a mobile device. Compare that to mass-market ads that could have no relevance or context to that particular moment, and it's easy to see mobile's real-time influence.