Marketers are increasingly looking to smartphones and tablets to reach consumers, as spending on mobile advertising more than doubled during the first half of this year. According to new estimates from the Interactive Advertising Bureau, mobile-ad spending in the U.S. totaled $3 billion in the first half of 2013, up from $1.2 billion the previous year. In related news, research firm IHS projects that the number of Internet-connected video devices will pass 8 billion by 2017, a figure that should also be of interest to advertisers. Continue reading Mobile-Ad Spending More Than Doubles in First Half of 2013