The best way to reserve an ad is to:
- A) Create a reservation campaign in AdWords
- B) Contact a Google sales representative
- C) Create a standard video campaign
- D) Enter specifications on the “Reservation” tab
Explanations:
You can contact Google representative concerning custom thumbnails for video ads or ad reservations for example.
As an advertiser or ad agency, you can buy placements on a reservation basis-instead of through the AdWords auction–when you want to pay based on the number of impressions (also known as cost-per-thousand impressions) or per day (cost-per-day). Reservation campaigns also let you buy impressions at a fixed rate.
Read more here: https://support.google.com/partners/answer/6030919