AdWords Getting New Conversion Tracking Metrics

Google announced today that in the coming months, they will be updating the AdWords conversion tracking metrics in the new AdWords interface, and other account management platforms like AdWords Editor and the AdWords API.

The updating has already begun. Now "conversions" columns are labled Conversions (1-per-click), while "transactions" columns are called Conversions (many-per-click). 1-per-click means if one click leads to multiple conversions, it's counted only once, but many-per-click means each conversion counts each conversion that occurs after a click. Emel Mutlu of the Inside AdWords Crew
If a customer clicks on your ad, buys a bag of peat moss, then subscribes to your newsletter, you'll see two many-per-click conversions, but just a single 1-per-click conversion in your account. If the same customer returns to your site a few days later and buys a trowel (but doesn't click on one of your AdWords ads to get there), you'll now see three many-per-click conversions, but your 1-per-click conversions will still remain at one.