Wunderkind provides two Identity lookup methods:

Real-time Identity which is exposed via Wunderkind's WebSDK GetID call. This method uses Wunderkind identity advantage to identify a visitor at the beginning of a site visit and anytime during the site visit.
1. The Real-Time Identity method enriches a user's Onsite Personalization experience and increase segmentation and sends.
Batch ID LookupThis method uses Wunderkind identity advantage for post-visit data processing identification. Batch ID Lookup
1. The Batch ID Lookup method can be used to enrich your CDP, Segmentation, or other use cases.