A glossary of the advertising market

The ideas airtime sales run on, explained in plain language and without industry shorthand. One page per term: what it is, how it is calculated, and why anyone looks at it.

Campaign metrics

• GRP — the sum of the ratings of every airing of a spot
• wGRP — the same GRP, adjusted for spot length and position in the break
• CPP — what one rating point costs

Inventory and selling it

• Airtime occupancy — how much of the advertising time has been sold
• Programmatic TV — buying airtime by rules instead of by negotiation

After the campaign

• Post-buy — checking what you got against what you planned
• Pacing — whether the campaign is delivering on schedule, while it still can be fixed
• Makegood — replacement airtime when the schedule did not deliver
• Broadcast certificate — the document a broadcaster confirms airings with
• Affidavit — the same proof, as the English-speaking market names it
• Proof of play — what DOOH uses in place of it

Selling the inventory

• Avails — the slots a broadcaster still has open to sell
• Daypart — how the broadcast day is divided, and why that sets the price

None of this has to be calculated by hand: in OpenMediaLogic the arithmetic runs as the plan is built. Common questions about the platform itself are in the questions and answers.