Trackback is a mechanism by which two sites can stay informed each time one site refers to the other by means of trackback 'pings'.
In Confluence, Trackback is enabled by a site administrator from the Administration Console. When Trackback is enabled, any time you link to an external webpage that supports Trackback Autodiscovery, Confluence will send a Trackback ping to that page to inform it that it has been linked to.
Confluence pages also support Trackback Autodiscovery, and when Trackback is enabled can receive trackback pings sent by other sites.
To see who has sent a Trackback ping to a Confluence page,
Confluence incoming trackback pings only work with referenced pages that are public (anonymously viewable)
See more information about the Information View.
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