| Traffic role | Few customers reach the rest stop. | Stand where customers appear and count arrivals for a minute before spending anything. The official description treats customer attraction as its own system. A sales purchase cannot help shoppers who never arrive, so traffic is always triage one. |
| Sales role | Customers arrive but spending feels weak. | Watch one full customer visit from arrival to checkout. “Sell more items to increase average customer spend” makes spend-per-visit the named lever. The fix that matches the symptom is stock-side, not traffic-side. |
| Expansion role | A visible expansion competes with another need. | Read the expansion requirement text in your current session. Expansion is official, but the game publishes no universal upgrade order, so each expansion is a fresh decision against your visible bottleneck. |
| Rebirth role | The rebirth option is visibly available. | Read the full reset confirmation: cost, what resets, what stays. Rebirth officially speeds up customer shopping. It multiplies an existing loop, so it pays most once traffic and stock already convert well. |