[hnsummary]

Article Summary:

AdMob is an advertising network that specializes in showing ads for mobile phones. Their ads can be shown in web pages loaded in mobile web browsers, or the ads can be embedded in mobile applications that run natively on the phones. AdMob does not segment ads in browsers from ads in applications so a single device running a browser and several applications with AdMob ads count count as several devices in AdMob’s figures. This likely leads to a significant inflation of the total number of iPhone and Android users.

http://hnsummary.com/2010/03/30/why-admob%E2%80%99s-reported...