Consistent with what could be projected from the 1H numbers the IAB released, the trade group reported this morning that mobile ad revenues in the US for 2012 were just under $3.4 billion. This number is below what many other firms had projected but still represented more than 100% growth.
Overall, mobile ad revenue constituted 9% of total internet ad revenues for the year, which were $36.6 billion. Retail and financial services are the top two ad categories. And over time more of that digital retail ad spend should migrate to mobile. Within a few years, we should probably expect that about 20% to 25% of the overal digital spend should go to mobile. That will still lag consumer behavior but be more in line with it.
The following are the breakdowns by category and format for US online advertising as a whole:
There was no sub-category breakdown provided by the IAB for mobile. However search dominates, followed by mobile display. The full report, which isn't yet out, may provide further insight into the division of revenues.