I’m mapping a 6‑week upskilling plan for our sales managers built around GA4 funnel exploration, Shopify analytics, and HubSpot multi‑touch attribution so we can connect paid media signals to how we coach and forecast. If you’ve taken a course or cert that turned into a real lift (e.g., +8–12% online revenue in a quarter or a tighter LTV:CAC), which one and what changed in your team’s behavior?