Shipments of low-cost smartphones, about $250 each, will grow from 259 million in 2013 to 788 million in 2018, according to ABI Research. Those that cost $400 and above will grow from 635 million to 925 million during the same time frame. So when it comes to product listing ads on smartphones, rethink the heavy text strategy and build ads that speak to consumers through images and as little text as possible, according to Ally Alexander Dao. She serves tips to marketers that want to optimize ads for Enhanced Campaigns on smartphones. Read the article here.