Google is poised to rake in a colossal $38.6 billion in online advertising revenues in 2013, equating to a third of all revenues tallied from the ten biggest online advertisers, which is expected to reach a total of some $117.6 billion in 2013, up from $104 billion last year.

Twitter ranks ninth amongst the top online advertisers, with its estimated $600 million in online ad revenues this year accounting for just a half percent share of the overall market.

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