Summary:

Google is developing a service that could dramatically extend the reach of its lucrative keyword-based advertising by linking such ads to e-…

Google is developing a service that could dramatically extend the reach of its lucrative keyword-based advertising by linking such ads to e-mail…it is working on a way to serve advertising to an e-mail at the moment it is opened.

It may also be thinking o starting its own-branded e-mail: Offering its own branded e-mail — whether for free or with enhanced services like spam filtering — would also enable Google to tie users more closely to its search site and to steal customers from rivals.

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