Brian Steinberg Senior TV Editor The TV networks haven’t been particularly fond of Nielsen in recent months, but their digital rivals seem pretty impressed. The media-measurement giant has entered into a pact with streaming portal Roku that calls for Nielsen to track viewership across traditional and connected TV watching, desktop usage and mobile screens. Advertisers who use Roku can get data on the reach of their commercials among Roku users that will rely on so-called “deduplicated” audiences, or people who aren’t seeing the same content on different viewing platforms. “Marketers are increasingly investing in CTV to follow consumers. However, brands want consistent measurement across screens,” said Kim Gilberti, senior vice president of product management at Nielsen, in a prepared statement. “Marketers can now better evaluate CTV inventory’s unique reach and frequency in conjunction with their entire Roku buy in a comparable and comprehensive manner, and advertisers can reduce waste and help ensure that relevant ads are delivered to the right audiences across devices.”