Dark Social: We Have the Whole History of the Web Wrong

One dirty secret of web analytics is that the information we get is limited. If you want to see how someone came to your site, it's usually pretty easy. When you follow a link from Facebook to The Atlantic, a little piece of metadata hitches a ride that tells our servers. There are circumstances, however, when there is no referrer data. This means that this vast trove of social traffic is essentially invisible to most analytics programs.

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