When I started writing for blogs and doing more work with computers, one of the words I started to hear a lot was, "ping," as in "Ping me when you write the post." After a while I figured out that it meant, let me know when the post is up.
Ping services do just that. They let search engines know that your blog has been updated. There are a lot of ping services out there. In the Publishing Settings of your Blogger blog, you can indicate that you want the service, Weblogs.com to be notified automatically when you post a new post. The blog search engine, Technorati allows you to "claim" your blog so that Technorati is automatically pinged when you write a new post. You can claim your blog by either giving Technorati your username and password, writing a post that includes some HTML code that Technorati gives to you, or by pasting the Technorati HTML code in your blog template. Technorati provides pretty clear instructions for how to do this, but always remember to PREVIEW changes you make to your template before you save them.
Other ping services like Pingoat and Ping-o-matic will ping multiple blog search engines for you. All you have to do is enter the name of your blog and its URL and hit enter.
It is a good idea to bookmark the ping services you are using and make it a habit to submit a ping to them everytime you write a new post so that blog search engine users will find you.