Same thing as affiliate tracking. A unique ID attached to the links you use to send traffic to the merchant that is specifically for you to track your sales for or referrals to the merchant. Example of a tracking code in a link: merchant.com/?ID=YOURUNIQUEID – You'll find an in-depth article on what affiliate tracking codes are and how to use them here.
While your site is still new, it's a good idea to start capitalizing on someone else's audience. Continue focusing on building your own content, but also considering writing content for a few big, high-traffic blogs that are relevant for your niche. By writing content for a bigger site, you are able to get in front of another audience and showcase your expertise on a particular topic. This will eventually lead to more traffic to your site, as well.
The amount of time a Cookie set by someone clicking on your affiliate link has to show a conversion before you are no longer credited with a sale even if that user eventually ends up making a purchase. The standard length of a Cookie is typically between 30-90 days. Anything below 30 is considered low/short while anything above 90 is considered to be healthily above average.
There are two ways to approach affiliate marketing: You can offer an affiliate program to others or you can sign up to be another business's affiliate. As the business driving an affiliate program, you'll pay your affiliates a commission fee for every lead or sale they drive to your website. Your main goal should be to find affiliates who'll reach untapped markets. For example, a company with an e-zine may make a good affiliate because its subscribers are hungry for resources. So introducing your offer through a "trusted" company can grab the attention of prospects you might not have otherwise reached.