Quick Answer: Attribute pipeline by stitching every landing-page touch to a single person record, then assigning credit at the lead, opportunity, and revenue stages separately. For demo requests, the cleanest model is multi-touch attribution with a primary conversion source for operational reporting and fractional credit across all pre-conversion landing pages for pipeline influence.
When prospects interact with multiple landing pages before submitting a demo request, attribution should not be treated as a single-click decision. The correct approach is to unify identity across sessions using first-party cookies, form fills, CRM contact matching, and UTM-preserved event history, then evaluate each page view, CTA click, and form interaction against the same lead or account record. In practice, you should record both the last conversion touch for routing and SLA reporting, and a multi-touch credit model for pipeline analysis, so sales, marketing, and finance can see which landing pages introduced demand, nurtured intent, and ultimately converted the opportunity.