For some reason my Yoast was not respecting the "primary category" and creating multiple instances of duplicate content when a post was in more than one category. I just installed this and hit "save" on the basic settings and the problem was resolved. Fast, easy, and WORKS, can't do better than that. Thank you!!
I was hoping to solve the blog pagination problem on WordPress where the pages are /2/, /3/, /4/ etc. and supposed to canonical link to the blog homepage.
But this canonical plugin just links to itself always.
blog/2/ canonical links to blog/2/ instead of /blog/ even though I set it to advanced and defined my own canonical links.
Long story short, it always self-canonicals, but not to a another page when dealing with blog posts and pages. Pretty simple minded tool with no sophistication in mind.