What is the KEY difference between enhanced CPC bidding and Target CPA bidding?
The KEY difference between Enhanced CPC (ECPC) bidding and Target CPA (TCPA) bidding lies in their primary optimization goal and level of automation. Enhanced CPC is a semi-automated bidding strategy that *adjusts your manual bids in real-time based on the likelihood of a conversion. You set a base bid, and the system may increase or decrease that bid slightly if it predicts a conversion is likely, aiming to get more conversions while staying within your control. Target CPA, on the other hand, is a fully automated bidding strategy where you set a target cost per acquisition (CPA), and the system automatically sets bids to try to achieve that target CPA. With TCPA, the system has more freedom to adjust bids significantly, potentially increasing bids much higher than your manual bid for some keywords if it believes it will lead to a conversion at or below your target CPA. ECPC aims to improve manual bidding efficiency, while TCPA aims to achieve a specific cost per conversion using full automation.