Data-driven weights apply to new conversions after a refit. Recompute the past with a full refresh under Data & Processing.
The campaign tracking parameter is under Info & support → URL parameters, not this settings page.
Marketing
Marketing setup
Map contract tables, then configure conversions, attribution, schedule, and report defaults.
Marketing reports need the Interact performance tables in Data mapping: campaign mapping, channel metrics, sessions, conversions, and orders. Map order lines and products as well for Product Performance.
Then open Settings → Marketing (organisation admins).