This way you use xml sitemap:
1.Once you have logged in to your WordPress website, scroll to the PLUGINS tab in your dashboard’s sidebar. Expand it and click ADD NEW.
2.Search for “Google XML Sitemaps.” At the time I’m writing this post, it is the second plugin returned in that search. Click INSTALL NOW, and confirm YES, you do really want to install this plugin.
3.After the installation process is complete, remember to click ACTIVATE, or your plugin will not be available for you to use…it will merely be installed on your site.
4.Once you do that, scroll to the SETTINGS tab in your dashboard’s sidebar and expand it. You should see a new link for XML-SITEMAPS. Click it.
5.You will see a notice at the very top of this settings page that tells you to build your sitemap for the first time. Click that link… and the magic will begin!
Once your sitemap is built, you will not need to make any other changes to the settings on this page. This plugin is fantastically configured straight out of the box! I know – it almost sounds too easy… but it’s true. So take four minutes and go install this plugin on your site right now.Then, if you have any questions, feel free to pop over to the forum and ask.