Affiliate marketing is when a publisher drives traffic to an ecommerce site in return for commission if those visitors take a specific action within a set time. Many times the traffic comes from publishers, and sometimes from Amazon, eBay and other marketplaces. A search or a click on a retail or publisher's site will trigger the on-site ad, which as search marketers know has moved from a mostly text media to text and images. Jack Simpson believes it's one way to circumvent ad blocking on publisher sites. He details how it works, and offers up tips on using the media during the holiday season.