: Google Analytics - TOS section pertaining to privacy The Google Analytics terms of service does do not allow to track "data that personally identifies an individual (such as a name, email address

@Hamaas447

Here's a bit more reading on the subject too:

A post by Google Analytics Evangelist Justin Cutroni

A thread from the GA product forums

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@Smith883

Well, from what I've gathered from Google's documentation on client IDs and from dimension widening, as long as you're not passing in PII data, you're abiding by the TOS.

I mean, Google outright gives you the documentation to get and client id:

ga(function(tracker) {
var clientId = tracker.get('clientId');
});


So you could easily put this into a custom dimension to use in UA. As long as you're not using any personally identifiable information within Universal Analytics, all is OK.

LunaMetrics has put out a blog post about linking MailChimp email campaigns using the client ID with Universal Analytics. From the various conversations I've had with other industry folks over the year, is that having that unique id will allow us to finally connect GA to CRMs, etc.

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