Publishers are encouraged to experiment with a variety of placements and ad formats. However, AdSense code may not be placed in inappropriate places such as pop-ups, emails or software. Publishers must also adhere to the policies for each product used.
Google ads, search boxes or search results may not be:
Integrated into a software application (does not apply to AdMob) of any kind, including toolbars.
@angelyuen from my experience AdMob is one of the best performing mobile ad networks around. Also AdMob and AdSense are pretty much the same thing these days.
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Ad placement
Publishers are encouraged to experiment with a variety of placements andad formats. However, AdSense code may not be placed in inappropriate
places such as pop-ups, emails or software. Publishers must also adhere
to the policies for each product used.
Google ads, search boxes or search results may not be: