What happens when I submit my blog on ping sites like pingomatic.com?

Question

After reading "what I should do after posting a blog" I submitted my blog URL in pingomatic.com.

Then I got "Pinging complete!" message which shows results as can be seen below. It say "Bookmark this page and come back to it later to automatically re-ping.". I don't actually understand how this works and what happens by this pinging process! Any explanations on how this webapp works?

Weblogs.com Ping sent.

Blo.gs Ping sent.

Feed Burner Ping sent.

My Yahoo! Ping sent.

...

Answer 1

Pingomatic is a service which alerts (pings) multiple RSS aggregators/search engines in one action when there is a new post on your blog. This saves you from having to register your blog to all of the services individually.

From the Ping-O-Matic main page:

What is this?

Ping-O-Matic is a service to update different search engines that your blog has updated.