What do cradle-to-gate and cradle-to-grave mean?

They describe the boundary of a PCF. Cradle-to-gate covers emissions from raw material extraction to the point the product leaves the supplier's factory gate. Cradle-to-grave adds distribution, use and end of life. A buyer calculating Scope 3 Category 1 normally needs the cradle-to-gate figure, because downstream stages fall into other categories.