Specify UTM parameters your visitors should be referred by for your SleekBox to be shown.
First of all, you will have to create a UTM campaign if not already done. We recommend using Google's UTM campaign builder. Decide whether your want your SleekBox to be hidden or shown based on UTM parameters. Type in your campaign source, campaign medium and campaign name. You can add as many parameters as you want by pressing "Add another parameter" once you've started typing in the first.