CPA Approved Traffic Source ??

Hi All,
A quick question, I am new to CPA affiliation. Whilst browsing CPA offers, when its says approved traffic US only, or UK only or India and US only etc what does that means actually.
Does that mean for example the offer is to pay after successfull download and approved traffic source is US only, so if any one who will download with in the US will be approved and if not in the US and download will not approved??
is it my correct understanding?
Thanks
N

See original post by nysoh