There is research that supports the idea that yes, people do check the promotions tab. http://returnpath.com/wp-content/uploads/2015/02/Return_Path_-_The_Tabbed

There is research that supports the idea that yes, people do check the promotions tab. http://returnpath.com/wp-content/uploads/2015/02/Return_Path_-_The_Tabbed_Inbox.pdf http://returnpath.com/wp-content/uploads/2015/02/Return_Path...