Rewarded ads
Rewarded ads are ad units with Combinatorial or video ads used for monetizing games. The unit fills the entire screen of the app. For watching an ad, the user gets a reward or in-game currency. For detailed instructions on how to create these ad units, see here.
General recommendations on how to improve the quality of ad units are given in Improving resource quality. Below are some practical tips to help you attract more valuable traffic with rewarded ads.
Placement
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Don't overuse the reward mechanics (they shouldn't be the only way for players to advance).
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Don't show other ad formats after the user views or closes a rewarded ad.
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Load the ad unit only when the user clearly indicates their intent to watch the ad.
Controls
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Don't use custom buttons or ad unit controls, stick to the standard kit.
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Don't close ads automatically — leave it to the user.
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Don't give users a way to close the ad before the timer expires.
Content
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Users should clearly understand what they'll receive for viewing an ad and how to claim their reward.
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The reward should only become claimable after the timer stops or the ad ends.
