Ad Bridge Custom Audiences - What data is shared?

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Ad Bridge Custom Audiences - What data is shared?

When I send a custom audience to FB or Google, do I need to create a custom view with only data these platforms match on? Or does Marketo only map those fields with each platform and a custom view is not necessary? I work at a bank and our compliance team needs to understand exactly what data is shared with these platforms for our records.

Ashley HendersonJela Bubic