Canonical URLs on Archive Pages
Adds canonical link tags to the blog page, category, tag, author and post type archives, which WordPress only does for single posts and pages by default.
Snippet Library
WordPress code snippets, ready to use
3,040 free snippets from the WPIDE team and the community. Copy the code, or add any snippet to your site in one click with WPIDE.
Remove ?replytocom From Comment Reply Links
Stops comment reply links from creating ?replytocom= URLs that crawlers treat as duplicate pages, and redirects any such URL to the clean post address.