August 15th, 2006

Marketers Trace Paths Users Leave on Internet

By Saul Hansell
The New York Times

If you use Yahoo’s Web search engine to learn about hybrid cars, the site will quietly note that you fit into a group of users it calls “Consciously Cruising.” Earlier this year, Yahoo introduced a computer system that uses complex models to analyze records of what each of its 500 million users do on its site: what they search for, what pages they read, what ads they click on. It then tries to show them advertisements that speak directly to their interests and the events in their lives.

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