The first step always will be to log into your affiliate account and find the eCommerce offer you want to promote. Then, select one of the banners or text links for the offer and you will see some strings of code, they could be as simple as a URL with some extra unique number/letters attached to the end.
Always copy the entire code and do not edit it or it may not track properly. If you are using a text link, it is as simple as just linking some text to that URL. You can use it on your site, social media, guest blogs, PPC ads, or anywhere you like.
If you chose to use a banner, Smartlinks, video, or any other type of creative, you will notice a longer piece of code than the above text link. This code will need to be implemented into your site in the places you want the ads to show.