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An external referrer is any site that links to your Confluence instance. Each time someone clicks on the external link, your Confluence site can record the click as a referral.
By default, external referrers for a page are listed under 'Hot Referrers' on the 'Info' screen of the page. Confluence shows a maximum of 10 referrers. If there are more than 10, confluence shows the 10 with the highest number of hits.
Note that you do not need to enable trackback in order to have external referrers enabled.
Screenshot: hot referrers on the page information screen.
To manage your external referrers:
The following actions will be available:
Screenshot: Manage external referrers