Definition: A signal sent from one web server to another to verify its existence. Pings are useful to bloggers because they notify other sites when a blog is updated thereby driving traffic. Pings are also used when Blog A sends a trackback to Blog B notifying Blog B (via a ping and resulting trackback comment) that Blog A has linked to Blog B. See 'trackback'.
Ping
By Susan Gunelius, About.com Guide
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