Ping
The search engines send their spider, or bot, to your site on a regular basis. They schedule their visits based on the size of your website and how often it appears to be updated. However, if you want to send a message to them letting them know you have updated your site, then you can do something called pinging. Pinging, in this context, is simply sending a code string to the search engines which says hey come look at my site again, its updated, and I want it indexed again.
All you have to do to ping the search engines is to go to a ping website, enter the URL of your blog, check the boxes of where you want to ping (generally do all of them) and then click Ping. It really is that simple and quick. The two most popular ping websites are www.ping-o-matic.com and www.pingoat.com.
It is generally advisable that you ping each time you update your blog, or each week at least. This makes sure your site is getting seen by the search engines and that it is being indexed as fast as possible.






