SEO based plugins from Yoast.
https://yoast.com/wordpress/seo/
Widgets · WordPress Plugins
Get access to data on 21,580,945 websites Yoast Plugins Customers. We know of 9,974,669 live websites using Yoast Plugins and an additional 11,606,276 sites that used Yoast Plugins historically and 1,458,397 websites in the United States.
Yoast Plugins websites that are also using other technologies.
Get a list of 21,580,945 websites using Yoast Plugins which includes location information, hosting data, contact details, 9,974,669 currently live websites and an additional 1,308,807 domains that redirect to sites in this list. 11,606,276 sites that used this technology previouslyand 1,458,397 websites in the United States currently using Yoast Plugins.
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