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Celtra.

Celtra.

Celtra is a provider of the first cross-screen HTML5 technology for brand advertising. Look for Celtra's Content Channel—everything you need to know about cross-screen display, on Digiday.com.

Celtra.

Celtra is a provider of the first cross-screen HTML5 technology for brand advertising. Look for Celtra's Content Channel—everything you need to know about cross-screen display, on Digiday.com.