What FAST actually is
FAST channels are linear, curated streams: a channel operator programs a schedule of content and monetizes it with ad pods, the way a broadcast channel does. They live inside ad-supported apps and platform channels — the same environment as free tiers of major streaming services and dedicated channel lineups.
The distinction that matters for buying: FAST is linear and scheduled, while VOD inventory is on-demand, and virtual MVPD services are paid subscriptions. Each has different ad loads, availability, and targeting behavior.