Setting up referral targeting is simple. Just head to the Message Builder and select Referral website in the Audience section, then enter the URL of the referral website you would like to target visitors from. 

Whether it's Google, Tripadvisor, or another website, you can greet each visitor with a unique targeted message based on where they came from. 

Want to learn more about what referral targeting is? Click the link to read What is referral targeting.