- eMarketer,  Wednesday, August 17, 2016 10:46 AM
                                
                            
                        
                    
                        
                            U.S. digital ad professionals within the publishing industry are most concerned about viewability, attribution, and measurement this year, according to an eMarketer article. More than two-thirds said
they were extremely worried or very worried about these areas, according to April research by Mixpo.
                        
                    
                    
                        
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