Boost Your WordPress Site’s Performance : Mastering Trackbacks and Pingbacks
A pingback is a type of comment that’s created when you link to another blog post where pingbacks are enabled. Trackbacks are a way to notify legacy blog systems that you’ve linked to them. If you link to a WordPress blog they’ll be notified automatically using pingbacks, no other action necessary.
Think of trackbacks as the equivalent of acknowledgements and references at the end of an academic paper or chapter in a text book. To send a trackback, add the trackback URI from the other blog post to the Send Trackbacks module in your blog post before you publish it. A trackback URI from a WordPress blog will end with /trackback/.
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