A TV campaign delivers 500 GRPs and reaches 74% of all people. What is the average frequency of exposure (OTS) to the advertising amongst people who were exposed to it ?是什么意思_A TV campaign delivers 500 GRPs and reaches 74% of all people. What is the average frequency of exposure (OTS) to the advertising amongst people who were exposed to it ?在线翻译_英语_读音_用法_例句