The Recommended Pingback for WordPress
When you publish an article to your WordPress blog, the system automatically will notify the other authors and sites with which you are linked. It is considered good "netiquette" to notify another author that you are commenting on his work. The process also helps you to notify the world that there is new information available and potentially build traffic to your site. Do not confuse pingback with the network utility ping. A pingback is the Internet equivalent of saying, "I'm talking about you here," to other bloggers.
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Pingbacks
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A pingback is automated by the WordPress blog engine. Any time you add a new post or save changes to a published post WordPress will notify a list of update services that you've updated your blog. WordPress uses a remote procedure call, XML-RPC, to deliver these pingback notifications. They are configured automatically in WordPress and use Ping-o-Matic by default. Pingbacks are used to notify others that you've linked to them and potentially return traffic to your blog.
Ping-o-Matic
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Ping-o-Matic is included as a default update service with WordPress. Ping-o-Matic is an offshoot project from the company Automatic, where WordPress.org and WordPress.com are developed and hosted. It is an all-inclusive update service, used to notify other services that your blog has updated. You may see long lists of update services. Ping-o-Matic now feeds out to almost all of the relevant ones.
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PingShot
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Google, through its Feedburner service, offers an alternative method of pingback named PingShot. One advantage PingShot has over Ping-o-Matic is that it will work even when hosting providers have disabled the PHP functions necessary for pingback services. PingShot is integrated into FeedBurner, and you enable it within the Publicize section of your FeedBurner management interface. FeedBurner allows you to automate, track and potentially deliver ads through your blog feeds and is worthy of your consideration, if it's not already operational for your site.
Ping Spam
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Pingback services have been exploited as a means to deliver traffic to content through an unfortunate practice called "ping spam." This tactic ensures that pingback services are configured to quickly ignore any site that repeatedly pings updates. The default configuration for WordPress is to ping every time you save changes when editing a published post. Depending upon your publishing habits, you may get classified as ping spam. There are WordPress plugins that will enable you to limit the frequency of pingback calls or disable pingbacks under certain conditions. If you make multiple edits in rapid succession to a published entry in your blog, consider finding and installing one of these plugins. Ping Optimizer is one such example.
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