Optimizing mobile Web sites that generate traffic through organic results should become a priority for search marketers -- or companies risk leaving brand recognition and sales on the table. ABI Research estimates the m-commerce market will account for 24.4% of overall e-commerce revenue by the end of 2017. The research firm estimates that the mobile online commerce market in 2011 doubled in size to $65.6 billion. ABI estimates the global volume of mobile data traffic will exceed 107 exabytes in 2017.