Ping is an option to quickly notify search engines or crawler that your site has a new or updated post. This is a useful method for faster indexing to your published or modified post, although submit a site’s sitemap is already enough anyway.
WordPress Ping by default automatically notifies popular update services that you’ve updated by sending ping each time you create or update a post. In turn, update services process the ping and updates their proprietary indices with your update. It makes this easy for you by listing Ping’s server such as “rpc.pingomatic.com” by default.
This actually will do with just one “ping” from your site, will let many other ping services know that you’ve updated. You can use the following working ping’s server below. And all you need to do is sit back, relax, and let it work for you.
http://rpc.pingomatic.com/ http://rpc.twingly.com http://www.blogdigger.com/RPC2 http://ping.blo.gs/ http://ping.feedburner.com http://ping.rss.drecom.jp/ http://www.blogpeople.net/servlet/weblogUpdates
Here are working WordPress Ping List:
If You are using WordPress Multisite network, by default editing the ping services site is disabled. This can be re-enabled with a plugin such as ping optimizer or the Activate Update Services plugin.
http://rpc.pingomatic.com http://rpc.twingly.com http://api.feedster.com/ping http://api.moreover.com/RPC2 http://api.moreover.com/ping http://www.blogdigger.com/RPC2 http://www.blogshares.com/rpc.php http://www.blogsnow.com/ping http://www.blogstreet.com/xrbin/xmlrpc.cgi http://bulkfeeds.net/rpc http://www.newsisfree.com/xmlrpctest.php http://ping.blo.gs/ http://ping.feedburner.com http://ping.syndic8.com/xmlrpc.php http://ping.weblogalot.com/rpc.php http://rpc.blogrolling.com/pinger/ http://rpc.technorati.com/rpc/ping http://rpc.weblogs.com/RPC2 http://www.feedsubmitter.com http://blo.gs/ping.php http://www.pingerati.net http://www.pingmyblog.com http://geourl.org/ping http://ipings.com http://www.weblogalot.com/ping
So why would you want to ping? One word: traffic. WordPress check update services to see if you’ve updated and then shows it on everyone’s site, usually by moving you to the top of people’s blogrolling list or putting a recently updated indicator by your link. Services crawler your links to track who links to you and who you link to; almost in real time. Many of the services offer their own forms for pinging their own service, but keeping track of all those services is a hassle.