Social interaction of your customers are very important to analyze their impact on your conversions.
Reading the official Google Analytics developers guide, the solution seems easy but unfortunately the code doesn't work if you are correctly loading the Facebook SDK asynchronously, that's because may be the the SDK is still loading when you subscribe to the event.

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An internal campaign banner is one that points to the same site it is contained in, for example you may advertise for one of your products while the user is looking at another one.
For banners hosted in external sites the best way to collect statistics is to use UTM (Urchen Tracking Module) query parameters: Google Analytics can automatically collect and group this type of data.
On the other side, the UTM approach is not good for internal campaigns, because when mixed with external ones, it compromises the analysis: try to imagine what happens if a user clicks on an external banner, then in an internal one and finally she makes a conversion. Which is the cause and which is the effect?

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