You open and account with ClickBank a company like Jumia and Konga but based in USA.
You get a product from ClickBank.
You make a squeeze page (website) where you review this product.
You make and advert on Microsoft ads, (Bing ads) or Facebook or Google ads.
People see your products reviews and buy your product.
Clickbank pays u 75% on any product u sell. Lowest commission on any product is $30