| Feature | Ad Rotation | Ad Pod |
|---|---|---|
| Goal | Select one commercial per request | Play several commercials in a single break |
| Response | One eligible commercial | Multiple ordered <Ad> elements |
| Control | Selection weights | Order or shuffle |
| Common use | Rotating sponsors across requests | Multi-sponsor commercial break |
Weighted selection
When a rotation includes ads with different weights, higher weights make selection more likely, but don't guarantee an exact percentage over a small number of requests. A rotation is not a guaranteed impression-allocation contract.
When to use which
For tube sites, start with a single ad or rotation for normal pre-roll delivery. Use Ad Pods only after confirming the site's player supports them. If you want three sponsors to appear back-to-back, you need a pod, not a rotation.