It is possible to add AdWords MCC accounts as new connections in Funnel, but even though Funnel may appear to pull data from them just like it will for any other AdWords account, there's actually no data to pull!

MCC accounts in AdWords are merely "views" that display data aggregated from individual AdWords accounts. The MCC account does not actually contain any data that can be retrieved through the AdWords API, so it will remain empty in Funnel despite a successful connection. Instead, you should gain access to (if you haven't already) and connect the individual AdWords accounts in Funnel.

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