Home - AI-Powered Shopping Ads - Two of these bidding strategies can be used in a Standard Shopping campaign. Which are they? Choose two. Two of these bidding strategies can be used in a Standard Shopping campaign. Which are they? Choose two. 2shares Facebook Twitter Pinterest LinkedIn Skype Facebook Messenger Enhanced cost-per-click (eCPC) Viewable cost per impression (CPM) Maximize conversion value Target return on ad spend (tROAS)