Provisioning & Activation — Turns a purchased product into a working one — spinning up tenants, issuing API keys, enabling seats or capacity. Order orchestration triggers it, and its completion signal is what lets conditional billing activation start the meter.
Provisioning & Activation lives in the Fulfill & Activate phase of Fulfill & Bill — the stage where you activate what was sold, meter what's used, bill it right. In the corpus tool index this phase maps to the Entitlements and Billingcategories.