Monetize Someone Else’s Website. If you place an ad on an affiliates site that either converts into a sale or generates a lead for you it is a form of Affiliate Marketing.

Types Of Affiliate Marketing.
Pay Per Click “PPC”
Pay Per Sale “PPS”
Pay Per Performance “PPP”
Pay Per Lead “PPL”
Residual Income Affiliate Marketing
Combination Affiliate Marketing

Affiliate marketing can reward both you and your online partner for helping each other acquire new business.