advertising, in some territories. The run itself does not say which use or territory it is for, so you state them, and the license check compares them with the license.
With the API
Sendlicense_context with every run that casts a licensed character:
A run with a licensed character and no
license_context answers 400 with the code bad_request, and is not recorded as usage. The same context applies to every licensed character in the run. Runs of your own characters, or of characters nobody licensed, need no context.