Under GDPR guidelines, contacts can opt-out of tracking their behavior. Behavior tracking includes opens, clicks, forwards, shares, clickstream (including Anonymous Browse Tracking), and Google Analytics. This can be done via form (Subscribe Form or Preference Center), one-off updates, data imports, and API.
How Would Tracking Preference Impact Drip Campaigns?
Those contacts that opt out of tracking (tracking is set to "Not Allowed") will not have their behavior like opens and clicks tracked for the sake of analytics, triggers, or automation. If included in an automation that uses flag events or wait for events based on behavior, contacts without tracking will appear to NOT have taken action.
For example they would fall into the "Did Not Open" or "Did Not Click" track even if they did as we are not tracking their behavior.
How Does This Impact Anonymous Browse Tracking?
If you are an Enterprise customer with Anonymous Browse Tracking enabled you MUST include a tracking preferences opt-in on your subscribe form. If new subscribers do not opt in to behavioral tracking their anonymous browsing data and subsequent click data will not be available.