Slot position in pod value 0 means Any ad in the pod
Any slot: no position guarantee on a request and no restriction on a bid. This is the default.
When to send it
On a request, 0 means the impression could fill any slot in the pod, which is also what an absent Video.slotinpod means. On a response, Bid.slotinpod 0 means the bid accepts any position.
Most pod impressions carry 0, and buyers price them as ordinary pod slots. It is confused with Video.podseq 0 (any pod in the stream), which uses the same number for a different question. Sending 0 explicitly is valid but adds nothing to the default.
Example
{
"imp": [
{
"audio": {
"slotinpod": 0
}
}
]
}Fields that carry it
Other values in slot position in pod
The slot position in pod list page explains the whole list and its common mistakes.