Google Analytics Donation Tracking Add-on
With Google Analytics Enhanced Ecommerce tracking you can take the guess work out of understanding how your website visitors donate. Enhanced Ecommerce tracking is free and built right into Google Analytics. When enabled, it captures a wealth of information about your donation transactions, including transaction amount, traffic sources, most popular donation forms, and the number of visits made before a donor gave.
You most likely already have Google Analytics tracking implemented on your website. This Google Analytics Donation Tracking Add-on doesn’t aim to replace your current integration. Rather, its goal is to enhance it. Simply install and activate the Add-on and immediately your donation data will begin tracking in Google Analytics.
Please visit official plugin page for more information