AdWords offers several tools that help you maximize conversions and get more out of your budget. Enhanced CPC (eCPC) changes your bids by lowering them on keywords that are less likely to convert, and increasing bids on keywords that do convert.
You will need to have implemented conversion tracking in your AdWords account. There are no minimum conversion requirements to start using eCPC, which means that you can enable this feature as soon as your campaigns start generating conversions.
To enable enhanced bidding, perform the following steps: