Welcome to the Q&A Forum

I have a pretty big directory site using Wordpress with lots of "locations", "features", "listing-category" etc....

Duplicate Content:

https://www.thecbd.co/location/california/

https://www.thecbd.co/location/canada/

referring URL is www.thecbd.co

is it a matter of just putting a canonical URL on each location, or just on the main page?

Would this be the correct code to put:

on the main page?

Thanks Everyone!