44% of Global Online Ad Revenue controlled by Google and on track to exceed 50% soon. 
What is more, ZenithOptimedia says that globally paid search will represent nearly 50 percent of all online advertising this year.
Overall the internet represents only 16 percent of global ad revenue according to ZenithOptimedia. TV, by comparison, is 40.2 percent of all ad expenditures. 
Who else has any doubts that we live in the age of Google? That paid search is at almost 50% of the overall Internet ad spend helped, but once Google makes a serious inroad into the Cable TV scene with its YouTube offering, you will not recognize the ad industry. Watch!
Link to Zenith report:
http://zenithoptimedia.blogspot.com/2011/12/quadrennial-events-to-help-ad-market.html
Zenith Optimedia Report: Google Controls 44 Percent Of Global Online Advertising
About Matthew Capala
MATTHEW CAPALA is a global inbound marketer, search strategist, author and speaker. By day, Matthew is the Head of Search at Profero, a global digital ad agency. He is also Adjunct Professor at NYU, where he teaches a graduate course on search engine marketing. By night, he is an Internet addict decoding insider PPC and SEO strategies via SearchDecoder.com and broadcasting tips via @SearchDecoder.Subscribe
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One Response to Zenith Optimedia Report: Google Controls 44 Percent Of Global Online Advertising
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This sounds exciting specially for those in the advertising and marketing fields. I am still hoping that Google will have a worthy competitor in this industry. It is just getting harder to buy ad spaces from Google at a cheap price. This is particularly hard for small time advertisers.