Before we get started, it needs to be clear that this enhancement to Google Analytics is only on the Premium version. You know, the one that runs over $150k / year so unless you are an Enterprise player this is only something to be jealous of and pray it will trickle down someday to the commoners who use the free version.
Google Analytics Premium has been around since 2011. If you need a refresher take a look at this video:
I recommend you read the post on the Google Analytics blog to get the details regarding attribution in this version. I personally jumped to the end because I’m a sucker for a good ending.
How it works: