Definition
A cookie window defines how long a referral click remains eligible for attribution after the visitor lands on the merchant site. Common windows range from 30 to 90 days, but browser privacy controls can shorten practical persistence.
B2B SaaS context
SaaS buying cycles can outlast consumer ecommerce sessions, especially when a trial, demo or internal approval is required. The cookie window should match buying intent while acknowledging server-side backup needs.
Operator note
Pair the published window with server-side customer identifiers where possible, and specify whether later clicks reset attribution or only the first qualified click counts.