Conditionals control a specified block of information in your message. Conditionals listed within the template editor via Messaging > Templates are available for sales order receipts only. Conditionals should be used to wrap your conditional information, for example:
{{ if_membership }}
This information only shows if a membership is present on the sales order.
{{ /if_membership }}
The italicized text above would only show on a receipt if a membership was purchased.
The following conditionals are available to use in the message template editor: