What Is A Canonical?
First and foremost, before we even define a canonical tag, if there is one piece of information you take from this guide, let it be this: Canonical tags are not directives like Robots.txt file.
This means Google views canonical tags as a strong hint, but at the end of the day, it considers many signals and decides whether to honor them.
Now that we have the golden rule out of the way, let’s get into what it is!