What is cross-device continuity and its impact on measurement?

What is cross-device continuity and its impact on measurement?

• A. Across all devices, identities are kept completely separate; the journey is measured independently per device.
• B. Cross-device continuity is not used in measurement.
• C. Cross-device continuity is about linking user identities across devices to understand the full journey and improves measurement accuracy.
• D. Cross-device continuity links user identities across devices to understand the full journey and improves attribution accuracy, but introduces privacy and identity resolution challenges.

Answer: (D)

Cross-device continuity means linking user identities across different devices to form a single, coherent view of the customer journey. This lets you see how a person moves from one device to another and attribute outcomes to the right touchpoints, giving you a clearer picture of the full path and improving measurement accuracy. However, stitching identities together relies on identity resolution—determining when two devices belong to the same person, which is inherently imperfect and can be incomplete. It also raises privacy and consent considerations, plus regulatory constraints, since combining signals across devices creates a more complete profile of a user. So, the idea is to gain a more accurate understanding of the journey and attribution, while carefully managing the associated privacy and identity-resolution challenges.