Phase 1 — Audit + tracking (week 1). Review existing campaigns, conversion tracking, GA4 / GTM, Quality Score, and landing pages. If tracking is broken (it usually is), fix it first.
Phase 2 — Architecture (week 2). Rebuild campaign structure: single-theme ad groups, intent-tier keyword grouping, negative-keyword foundation, audience layering for Search / Pmax.
Phase 3 — Optimize weekly (ongoing). A/B ad copy, search-term mining, budget reallocation, audience tuning, bid strategy adjustment.
Phase 4 — Report + scale. Monthly CPL + ROAS report, attribution segmented by campaign, landing-page recommendations for the next sprint.