Before I’m talking about sitemap plugin for wordpress, let me explains a little bit what sitemap is all about. Basically, sitemap is a hierarchical visual model of the pages of a website and it help users to navigate through a website that has more than one page by showing users a diagram of the entire site’s contents (analogous to book’s table of content).

Sitemap file is essential as far as search engines are concerned as it helps to speed up the discovery of your pages. However, there are few other factors that influence the crawling process like number of backlinks pointing to your website, uniqueness and relevancy of your content and few other things.

So, sitemap file has SEO-effect on your blog by making sure that all the pages in your blog can be found by search engines bots. So in order to create a sitemap file for Wordpress blog, you can use Google sitemap generator (this is the plugin that I used for my blog). This plugin will create a compliant sitemap (XML-sitemap) and this format is supported by Google, YAHOO and MSN Search.