You own a pet-supply store with various category pages on your website, and you’ve set up a tracking template so you can manage tracking and redirect information. Your final URL for the keyword “dog treats” could be something like:
http://www.2ndpartytracker.com/keyword=751123&ad={creative}dogtreats
http://www.dogtreatseasytrackingdestinationURL.com
http://www.3rdpartytracker.com/rd?keyword=751123&ad={creative}&url=http%3A%2F%2Fwww.example.com%2Ftreats%3Fstyle%3Ddog
trackingkeyworddestinationURL=12345678987654321%dogtreatsredirect
Explanation:
Ad and keyword tracking in AdWords relied on a destination URL that contained both your landing page URL and any tracking information you used. In July, we replaced the “Destination URL” field with two separate fields to make it easier to use tracking in your ads: One field for your ad’s final landing page URL, called “Final URL”, One field for tracking information, called “Tracking template”
Read more here: https://support.google.com/adwords/answer/6305348