The Sitemap Generator uses an external service to crawl your website and create a XML sitemap of your website. The generator works thus for every plugin out of the box. The computation costs for your website is also very low because the crawler acts like a normal visitor, who visits all pages of your site once. If you host your website on a dedicated server, you may not need this plugin, because you should have enough resources to generate your sitemap on your server. But if you host your website in a shared environment (as the most WordPress users do), it could be a good idea to outsource the...
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