Why sentiment needs a timeline, not a snapshot
A 4.3-star average tells you where a product stands; a twelve-week sentiment line tells you where it is going. Suppliers change materials, warehouses change packers, competitors change the reference point — and the average hides all of it until the damage is done. Trends surface problems while they are still small.
Watch for slope changes, not just levels: a product sliding from 4.6 to 4.3 over two months is a louder alarm than a stable 4.0. The dashboard's timeline view exists for exactly this — catching the drift early, when a packaging tweak or a listing edit can still reverse it.