Market of Behavioral targeting of online ads

Search results pages show ads close to the keyword searched. Similarly, ads that are shown relevant to a user’s behavior on websites is called behavioral targeting. It is done by depositing cookies on the users’ computers to track user action. This has privacy concerns but the market is increasing.

Spending on Behavioral targeting by 2008: $1 Billion
Spending prediction by 2011: $3.8 Billion

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