A queue listener allows you to monitor a ‘listener queue’ for the arrival of data. Data arrives in the form of JSON packages – placed on the queue either by an external system, or at submission of a web form.
Downstream queue activities can then use this data to execute offers. You might typically use a queue listener for the sending of an email e.g. after a customer makes a purchase, or when a web form is submitted in a landing page.
A validation error raised if a queue listener workflow contains two or more queue activities that use different audience definitions.