Samsung is the undisputed ruler of the Android roost. On a global basis it's the dominant handset OEM and there's no real challenge in sight -- other than the iPhone. Samsung continues to eclipse fellow Android manufacturers LG, HTC and Google's own Motorola in terms of sales and market share.
In that context one might expect Samsung to dominate Android-based advertising. Indeed it does. Mobile ad platform Velti has released data that show that Samsung mobile devices see nearly 70% of all Android ad impressions in the US market. This refers to display advertising but it probably extends to search impressions as well.
However on the tablet side, Samsung is second behind Amazon in the US market. There Samsung has had much less success and has yet to product a breakthrough device -- although its Note "phablet" has done well.
The following chart shows Android market share by ad impressions.
Yet when it comes to ad impressions on tablets the iPad and iPad Mini control more than 95% of the market according to Velti's network data. Chitika, another mobile ad network, puts the iPad's traffic share at about 82%, significantly lower though still dominant.
There has been some "cannibalization" of the iPad by its younger and smaller sibling. The Mini is less expensive and has lower margins than the iPad. Indications that the larger iPad's sales have declined in favor of the Mini have, to some degree, contributed to investor anxiety about today's Apple earnings (coming up shortly) .