When you create a trigger for Convert, the Made with Intent client script will tell Convert to execute an experiment by its ID at the point at which the segment matches. It's doing this behind the scenes:
window.intent.__convertxp[<trigger ID>] = 1;
...
window._conv_q.push([
'executeExperiment',
<trigger ID>,
]);
and this fires every time the trigger and campaign conditions are met.
How to create an experience in Convert
Configure your Convert campaign as normal
Create a New Audience in Convert and add a JS Condition to the rule set
Copy the Convert Experiment ID into the experiment trigger modal text input Convert Experiment ID
Copy and paste the JS condition within the expreiment trigger modal into the JS condition box in Convert
Save the trigger, and complete the campaign set-up