Track This: Web Tags Surged 53% in 2012

The labyrinthine maze of data-collecting technologies that makes the Web hum became even more complex in 2012. A Global Tracker report by privacy-services firm Evidon measured sites across the internet and found 987 Web-tracking tags from ad servers, analytics companies, audience-segmenting firms, social networks and sharing tools. That’s up 53 percent from the 645 unique trackers found in first quarter. The 10 most-prevalent technologies come from some of the biggest online players

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