I run a script on a local computer which sends out "review request emails" to customers who bought an item from a particular website. I have the website linked up to analytics so I can see how effective the emails are, and I make each link on the email with the correct google-analytics utm_ variables, like so:
www.website.com?utm_source=mailjet&utm_medium=email&utm_campaign=review_request
So I was trying to figure out if there's an additional variable I could add to the URL to distinguish between two different types of Review Request emails I send, to see which is more effective.
I've read that using utm_content
might be the variable I'm looking for, but I'm not sure I'd be using it correctly or that's the right choice.