Jomablue Registration has the optional feature to accept URL parameters for the purpose of identifying the source marketing campaigns for specific event registrations. The inclusion of campaign parameters within Jomablue Registration URLs, allows you to collect information and measure the overall effectiveness of those campaigns.
Want to track your marketing campaigns? More info here
Viewing Marketing Campaigns
If Marketing Campaign and/or other URL parameters are included, they will appear in Jomablue under the Custom Field tab of an order.
From with the Order, Click Custom Fields
In Custom Fields you can see the key and the value for each of the URL parameters that were included in when the order was placed.