1. Under the Create menu, Click "Promotion"
2. Find the promotion you want to use and Click "Assign"
3. Click "Assign session"
4. Select all the sessions you want this promotion to apply to
5. Click "Assign sessions to promotion"
For discount code promotions: When a user enters this code while purchasing the specific program, the terms of the promotion will apply.
For multi-registration promotion: These sessions will be taken into account as the qualifying sessions for the promotion.