Ad buyers and industry executives say the proliferation of new sites and automation in ad sales is driving down advertising pricing—by as much as 70% in some cases—making it tougher for sites to turn a profit from traditional online advertising. More news sites means more ad space is available.
Google's partner sites generated segment revenues of $3.52 billion, or 23% of total Google segment revenues, in the fourth quarter of 2013. This represents a 3% increase over fourth quarter 2012 Google network segment revenues of $3.44 billion.
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