Great question — answering as the UphillTech team:
RE: What is an affiliate network? Answer: en.wikipedia.org/wiki/Affiliate_network Commission Junction Linkshare.com Hydra Network Click Bank Click Booth Click Speed
Full answer by Dan Gayle: https://webmasters.stackexchange.com/a/2741 (CC BY-SA 4.0).
Need it done for your business? UphillTech.