Sure Google has 66% of the search market. But what defines a monopoly, at least as far as the government is concerned, is shifting and interpretive set of criteria.
Search isn’t steel, or oil. Monopolizing ‘finding stuff on the net’ can have a huge far reaching impact, as it operates as a gateway to information. So is Google a monopoly?
The best way to look at it is to take a historical perspective. I have done so in the below infographic, recalling US Steel, Standard Oil, AT&T and Microsoft and the impact their monopolies have had.