The affiliate will try to market to the consumer on whatever channel they see fit, whether that’s a social network, digital billboards or through a search engine using content marketing on a blog.
However, since you don't have any money to invest in advertising, you'll need to take the longer route and build your audience using organic methods.

If you’re a newbie in the affiliate world and everything seems too overwhelming, consider hiring professional help. In addition to identifying and recruiting new affiliates, an affiliate manager will also perform the following tasks: Approve affiliates Keep affiliates engaged in the program Respond to affiliate questions Track conversions and sales Negotiate terms with high-volume affiliates Conceptualize and measure promotions Inform affiliates about current and upcoming promotions Develop tools and ads to increase conversions Predict sales and ensure effective ads expenditure
There are also many individual programs, or affiliate platforms, that require a minimum amount of traffic. In those cases you need to provide a certain amount of value or hit certain goals before you can join. You may start out purely as an Amazon affiliate and then end up a few years later with dozens of affiliate offerings on your website. This is a natural part of growing the profitability of your website.