Are sitemaps important for WordPress Websites the way they are for other Websites? Yes, sitemaps are crucial if you want your blog to be discovered by search engines. The WordPress.com page on sitemaps says
Your blog is enabled with just about everything you need to be super-searchable. This includes an XML sitemap, which you can access at yourblogname.wordpress.com/sitemap.xml. No need to do anything extra on your end. The sitemap file included with your blog is available to every search engine that supports the protocol, including Google, Yahoo!, Bing, Ask.com, and others. WordPress.com automatically sends updates to search engines every time you update or delete a page or post.
Do you ever wonder if this stuff works? Here’s a fun way to test it. Set up a Google Alert for something specific, like your name. Put it in quotes, like “Anet Dunne,” then post something with those words (your name usually shows on a post). Other examples would be using your company name or your trademarked product name. Then see how long it takes before you get a Google alert with your post.
Remember this will only work with blogs that are “public.” If you have blocked your blog from search engines in your Settings, this won’t work. 😉