Google Rolls Out Features to Gauge Effects of Advertising

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Google Inc. rolled out a new advertising feature that will make it easier for companies to know when Web surfers see their ads, an improvement aimed at getting businesses to do more marketing online.

The effort, called Brand Activate, will signal when an ad impression has been viewed, the Mountain View, California-based company said. That means at least 50 percent of an ad has been viewable on a screen for at least one second. Google also will let customers make speedier adjustments to brand campaigns, depending on the responses of online users.