For commercial individuals please also
reference this blog article here.
The Who?
The who is simple, licensing and copyright usages are specifically
designed and to be used by commercial individuals/entities/companies and NOT
non-commercial individuals such as wedding/senior/private parties/etc.
clients. So when do you know you are using images for commercial purposes? Basically ask yourself, I'm I going to earn any revenue of any kind directly and indirectly from the images. If yes, then that is for commercial usage. Such as professional headshots will be sent to a talent agency where that talent agency uses it on paid/professional advertising and that advertises the model (you maybe) and other models within the agency plus the company as a whole earning the company more exposure. Hence why I generally do not work with agency models due to this plus they never want to pay for licensing (models and the agents).
