Final answer:
An affiliate web site facilitates sales between third parties by acting as a middleman and earning a commission on each sale made through their platform.
Step-by-step explanation:
A/an affiliate web site facilitates sales between third parties. An affiliate website acts as a middleman between the seller and the buyer, earning a commission on each sale made through their platform. These websites typically contain product listings and links to the seller's website, allowing customers to make purchases directly.