Update Services is a WordPress tool that allows you to let other people know that you have updated your blog.
This feature automatically notifies popular update services about the changes you have made on your website by sending a XML-RPC ping each time you publish or update a post.
In result, update services process your ping and updates their proprietary indices so that users browsing websites like Technorati etc can get to know about your most recent posts and updates.
By default WordPress only notifies pingomatic.com. In this lesson you will learn how to add more services and drive more traffic towards your website.
Login to your WordPress admin area and navigate to Settings -> Writing page. Scroll down to ‘Update Services’ section to add/remove services.
You can add following more XMP-RPC ping services: