Facebook Gripe Screens Show Room for Mobile-Ad Improvement: Tech

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Facebook Inc. executives are reminded how much work they have left to do in the $16.7 billion mobile-advertising market every time they glance at two large TV screens in plain view at the company’s headquarters.

The monitors, erected recently by advertising Vice President Andrew Bosworth, show a steady stream of complaints lodged by marketing customers about ads shown to users of the largest social network. Some lament that ad tools are difficult to use. Others say messages leave customers confused.