Using Google Analytics, you can provide information about how customers entered your
site. It will group all customers who clicked a link with the same campaign tag and display them
under reports and then campaigns. This is can be used to measure the last click that customers used to get
to your site.
You can include a Google Analytic campaign tag in your cart HTML. This way, anyone who clicks a
link within the cart will show up on the campaign report with a specific tag name. The campaign
report will tell you the number of people who clicked one of these links and purchased something. It
will also give you the total value of all purchases made via that link so you see how effective your
recovery emails are.