The beauty of WordPress is that it automatically tells Google (and a bunch of other sites) to look at your post- every time you post. But, there are a lot of other ping services as you can see in this post:
Ping services simply let other sites know when your site has updated. By allowing XML-RPC or (pings) as they are more commonly called, sites will know almost instantaneously when you update new blog posts or content. In turn, they will update their indices accordingly.These notifications, or pings, are valuable in many ways although I think you can also â€œover submitâ€ if youâ€™re not careful. It really depends if the siteâ€™s using the ping have URLs that are indexed in search engines. Most are dynamic search pages only, so they are fine.
Hereâ€™s a list of pinging services you can use with your blog…