Can you put a canonical tag on a duplicate page?

In a nutshell, if you have 3 duplicate pages (or at least very similar ones) you can choose just one of them to be shown in SERPs; this way, you can help search engines easily decide what page to show in the search engine results. However, canonical tags don’t help the search engines unless you use them properly.
For More Information Please Refer:

You May Also Like to Read: