Final answer:
The main difference between reservation and auction non-skippable in-stream ads lies in how they are purchased and priced.
Step-by-step explanation:
The main difference between reservation and auction non-skippable in-stream ads is the way they are purchased and priced.
Reservation non-skippable in-stream ads are bought at a fixed price and advertisers can reserve specific ad placements and volumes in advance. This gives advertisers more control over where and when their ads will appear.
On the other hand, auction non-skippable in-stream ads are purchased through a real-time bidding process where advertisers compete for ad inventory. Advertisers set a maximum bid, and if their bid wins, their ad will be shown to the viewer. The price for these ads is determined by the competitive bidding process.