Today's is the latest in a frenzied string of acquisitions by Microsoft and other Internet heavyweights looking to expand the reach and technology underlying their online advertising businesses. Most recently, Microsoft purchased YaData, an Israeli company specializing in behavioral targeting technology.

The Rapt buy is about helping well-funded Web publishers manage their advertising efforts with premium analytics and campaign planning features. Microsoft will fold Rapt's technology into its Atlas Publisher Suite (APS). Atlas is one of the brands Microsoft acquired through its purchase of aQuantive.

Consistently, Web publishers say that they want to focus on driving ad sales by improving their content and their users' experience, but that is only a small part of the equation, said Scott Howe, general manager of Microsoft's APS.

"Selling online advertising if you're a publisher is hard, and it's getting more complex as time goes on," Howe said.

Where many publishers need help is in the technical aspects of managing ad sales, such as pricing, forecasting and selling remnant inventory.

Pricing analytics are designed to help sales teams determine the optimal rates to charge advertisers, aimed at minimizing the amount of unsold inventory.

Microsoft expects the purchase to round out its suite of offerings for publishers.

"As a result of this acquisition, we feel like we have no gaps," Howe told InternetNews.com. "We can partner with the publisher very narrowly or very broadly."

The announcement comes just a day after Google (NASDAQ: GOOG) announced its first ad product following the close of the DoubleClick acquisition -- also a service for publishers to manage their ad inventories and sell remnant space on their sites.

In their latest ad moves, Microsoft and Google are both courting publishers. The principal difference is that Google's Ad Manager, a free, hosted service, is intended for small companies with marginal sales staffs, while Microsoft's acquisition of Rapt is geared for high-end publishers with large content networks and sales staffs. Among Rapt's clients are The New York Times Company, Fox Interactive Media, Yahoo and Microsoft itself.

"Our design here isn't for the long tail," Howe said. "It's for sophisticated publishers with sophisticated needs."


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