Yoast SEO Premium v3.1 – WordPress Plugin

WordPress on its own is relatively easy to optimize, but its SEO functionality should be extended using WordPress plugins. Yoast offers several WordPress plugins to optimize your WordPress SEO, built around one core WordPress SEO plugin.
Made PHP redirects faster and more efficient.
Added an interface to easily serve 410 (content deleted) headers for posts you have just deleted.
Added support for creating 451 (legal takedown) headers in the redirect manager.
Improved existing validations, ensuring redirects are complete and unique.
Added a validation error that checks for a redirect loop.
Added validation warnings for the following cases:
when a redirect points to an url that is redirected.
when a redirect point to a url that cannot be resolved.
when a redirect points to a url that doesn’t return a 200 OK status code.
Changed the interface for inline editing of redirects to resemble the redirect form used to add redirects.
Fixes a possible fatal error on update.
Replaced checkboxes and radio buttons with toggles on the Premium settings pages.
Makes sure post / term slugs uniqueness checks also take into account redirects.
Makes sure redirected are redirected both with and without trailing slash.
Takes the WP permalink structure into account in deciding if we should redirect to a slug with or without trailing slash.
Makes sure links to our knowledge base open in a new window.
Added a few knowledge base suggestions to our support beacon on the redirects page.