Google's latest update in AdWords is their reporting conventions for our Ad Extensions.
We are now able to view the performance data of each individual extensions - whether they were the drivers of clicks and/or conversions.
Simply go to your Ad Extensions tab, select the appropriate ad extension, Segment > This Extensions vs Other and voila!
Prior to this, there was much ambiguity re. which extension had been the strongest performer.
We were limited to knowing quite simply, whether our sitelinks, call, or review extensions worked!
However, this is no longer the case. We now know which of our assets are working, providing us an opportunity to hone in on the performing ones and optimise.