In general:
- Inventory changes, including new or edited ad units, take effect within 60 minutes.
- Line item changes, including targeting, creatives, and inventory selection, take effect within 15 minutes.
- Line item impression delivery will occur within 30 minutes of activation.
- Line item impression reporting (and line item status changes from ready to delivering) will occur within 30 minutes.
- Delivery period changes, including flight dates, impression goals, and pausing or unpausing campaigns, take effect within two minutes.
