Advancement means "rank advancement" in BSA terminology. A Cub Scout achieving the rank of Bear or a Scouts BSA member achieving the rank of First Class would be examples of advancement.
This is different from "training", which is the terminology used for teaching a specific skill to someone, be a Scout or an Adult Leader.
Advancement comes in several flavors:
- Cub Scout advancement
- Scouts BSA advancement
- Venturing advancement
Requirements for advancement are set by BSA National and implemented by local units (Packs, Troops, or Crews), Districts, and Councils.