The affiliation link for any page of the site requires the addition of a reference variable in the query string with the related affiliate ID assigned. This is a possible example: http://sitename.it/shop/?ref=13.
The ref variable can be changed freely by the administrators of the site from the plugin settings panel through the “Referral var name” option.
Each affiliate can generate the affiliation link from the dashboard (see here how to configure the Affiliate dashboard).
Clicking on the “Generate link” entry, users will be redirected to a page in which they can obtain dynamically the affiliation URL for a specific shop page.