The ad-to-landing-page handoff makes or breaks ROAS. **Message match** between ad headline and LP H1 is the #1 LP conversion driver. **PageSpeed** below 2.5s LCP adds 30%+ bounce. CRO execution itself defers to `marketing-agent` (VWO / Hotjar / Maze) — this skill ships the message-match brief, the pre-launch PageSpeed audit, and the hand-off path.
