Having a sitemap installed on your blog will help Google, Bing, Yahoo! and other search engines to index your content more effectively. There are a few ways to generate a sitemap, but the easiest and quickest way is to use the Google XML Sitemaps plugin. Once set up and configured, it will create a sitemap like this.
Each time a new post is created on your blog, the sitemap will be updated with a link to the new post.
There are two ways to inform Google of your sitemap:
1) Add it to your Google Webmaster Tools account (login, choose site, site configuration, sitemaps, add the URL of your sitemap)
2) Ping Google’s sitemap server
http://www.google.com/webmasters/sitemaps/ping?sitemap=http://www.name.com/sitemap.xml
You should also include a link to the sitemap in the robots.txt file.
