In preparation for improvements to CPA bidding in AdWords, starting October 26, 2015 , we'll perform a one-time removal of inactive ad group-level CPA bids. What's an inactive ad group CPA bid, you ask? An ad group-level CPA bid is inactive if the ad group's effective bidding strategy is not a CONVERSION_OPTIMIZER strategy. This includes CPA bids on ad groups whose effective bidding strategy is TARGET_CPA ,...