Campaign Optimisation by App/Site Steps how to do it: Press the three dots on the campaign you want to optimize. Select Targeting Optimisation . Change the filter to optimise by App/Site Name . Choose a period. Press Search . By following the mentioned steps you will see this table. There is an option to filter out by concrete app/site names on the right corner. The optimisation could be done by turning off app/sites that are not performing based on the secondary KPIs (viewability/ CTR and etc.)  Action column meanings: Play (red) - The site/app is not bidding and user can start bidding on this site/app by clicking on the play icon  Pause (green) - The site/app is bidding and user can stop bidding on this site/app by clicking on the pause icon  For the advanced filter on the campaign optimisation page, see Advanced Filter in Campaign Optimisation .