Control > Analyse > Order Referral Analysis > Referrer (link)

A Referrer link will not be generated if you click a link in an email or copy and paste a link into a browser.

You will have a Referrer link if you search for a page in (i.e.) Google and click the link.

In this case, the browser will send the Referrer link as the Google search URL.

Another example is if you click on this link (Demo > Products).

In that case, your Refferer link will be www.demo.affino.com.