An archival B2B case study of JobStudio about advertising for an industrial equipment portal. At the start, registration cost approximately $41.5, and scaling campaigns was risky due to non-targeted traffic and lack of data. We analyzed semantics, queries, regions, ads, and campaign effectiveness, filtered out unnecessary traffic, and built an optimization system. Result: 3477 targeted visits, 1673 new registrations, and a reduction in registration cost to approximately $2.45.