Google XML Sitemaps by Aren Brachold
This plugin will generate a special XML sitemap which will help search engines like Google, Bing, Yahoo and Ask.com to better index your blog or website.
With such a sitemap, it’s much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently.
The plugin supports all kinds of WordPress generated pages as well as custom URLs. Additionally it notifies all major search engines every time you create a post about the new content.
October 2015 Note: With the NEW version of Yoast SEO there will be a conflict with this Plugin running as well, as Yoast generates one for you.
Read more on it on this Post by wpcrux:
“Those who’ve been using Yoast’s WordPress SEO and/or a separate XML Sitemap plugin, might have came across this strange warning….”The following plugins might cause (xml sitemaps) issues with Yoast WordPress SEO: Google XML Sitemaps.”
You see this error when you install an XML Sitemap plugin (eg. Google XML Sitemaps, I use this plugin and got this warning) with already having WordPress Yoast SEO installed, and vice versa.
If you want to use the inbuilt sitemap feature in Yoast’s plugin, you need to do nothing except avoiding installing additional plugins to do that.
If you want to do it with a separate plugin like I do, just follow these two steps:
1. In your WordPress dashboard, navigate to the XML Sitemaps in the SEO section
2. You’ll see XML Sitemap option checked by default. You need to uncheck it, and then save the changes.”