Even if you update your site regularly, you can't guarantee search engines will find your site. Pings can help.
In this video, we talk about WordPress' ability to send out a ping. A ping is an alert to other sites that something has changed on your site.
Search engines like Google use pings to understand when you've added new content. WordPress will send out a ping whenever you update your content.
By default, WordPress uses a service called Ping-o-Matic, but you can update the services. Watch the video and find out how: