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# Reach Extension
- URL: https://www.adlingo.org/glossary/reach-extension/
- Published: 2025-01-15T09:52:00.000Z
- Updated: 2025-01-15T09:52:00.000Z
- Description: Additional inventory sources beyond a platform's owned and operated properties, often including third-party apps, websites, or devices.
- Author: Travis Lusk
- Tags: CTV, #glossary, #Import 2026-10-27 17:05

A CTV platform's way of expanding delivery beyond its own properties. The platform reaches into third-party apps, networks, or devices to fill your impression goal. The CTV label stays on the deal. The inventory quality can vary significantly. Before running reach extension, ask for the full list of sources it draws from and how the platform defines CTV for the purposes of the extension. Impressions on a phone are not the same as impressions on a living room screen.