Full Answer
Anonymous session cookie that links to customer profile when email captured. Bridges anonymous browsing to known customer.
Cherry Seed
What is Klaviyo Exchange ID?
Klaviyo tracking
behavioral data
customer identification
Quick Answer
Anonymous tracking cookie that becomes linked to customer profile when email is captured (form submission, checkout). Connects pre-identification browsing (product views, cart adds) to identified customer. Cookie name: __kla_id. Enables 'viewed product before subscribing' tracking.