Using the Sitemap, webmasters can inform search engines about the web pages and posts that are available for crawling on their blog. Sitemap – is an XML-file, which contains all URL-addresses of blog’s pages and posts, combined with the metadata associated with each URL-address (date of last modification, frequency of changes, the priority of the page) so that search engines can crawl the blog more correctly.
Usually, search engine crawlers are finding new blog posts by incoming links or links from another pages of your blog. By adding a sitemap to your blog, you can direct search engines to all your content. Creating a Sitemap for your Wordpress blog is one of the first and important steps in search engine optimization of your blog (i.e. SEO).