# ReservationType

> [!WARNING]
> Display \& Video 360 API v2 has sunset.

Possible reservation types for a line item or insertion order.

| Enums ||
|---|---|
| `RESERVATION_TYPE_UNSPECIFIED` | Reservation type value is not specified or is unknown in this version. |
| `RESERVATION_TYPE_NOT_GUARANTEED` | Not created through a guaranteed inventory source. |
| `RESERVATION_TYPE_PROGRAMMATIC_GUARANTEED` | Created through a programmatic guaranteed inventory source. |
| `RESERVATION_TYPE_TAG_GUARANTEED` | Created through a tag guaranteed inventory source. |
| `RESERVATION_TYPE_PETRA_VIRAL` | Created through a Petra inventory source. Only applicable to YouTube and Partners line items. |
| `RESERVATION_TYPE_INSTANT_RESERVE` | Created with an instant quote. Only applicable to YouTube and partners line items. |