This announcement has been archived and may be out of date.
The Interstitial timeout field (available in an ad unit's settings) is no longer supported by the Google Mobile Ads Android and iOS SDKs. As a result, AdMob has removed the Interstitial timeout field for interstitial ad units.
You can continue to create interstitial ad units in AdMob and continue to implement interstitial ad formats in your apps. This change does not affect ad serving or monetization.