Is a canonical tag important for indexing?

Jesper Nissen SEO

16 Mar 2026 — 1 min read

Is a canonical tag important for indexing?

I analyzed 4591 urls submitted to https://primeindexer.com for canonicals, and the impact on indexing.

The data is clear. If you dont have a canonical on your page, it will impact the chance of indexing that page.

Canonical present: 84.71% indexing rate

Canonical missing: 36.00% indexing rate

Conclusion: Make sure to include the canonical. Most Wordpress installations does this by default especially if you have some sort of SEO plugin, but its a shame to forget this, and have your blogposts not indexed because of it...

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Go to Google and search for this:

Go to Google and search for this: Is canonical tag important for indexing I just posted to my various social media about this, and used primeindexer to index the posts... This show how fast social media posts can rank for these longtail keywords with no, or very low competition... #parasiteseo

I asked Gemini about the top 10 ranking factors in Google. You can see what it said. According to Gemini, backlinks and

I asked Gemini about the top 10 ranking factors in Google. You can see what it said. According to Gemini, backlinks and schema are still important..

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Support platform launched for YACSS

Best google indexing tool.. a question I finally answered properly.

Go to Google and search for this:

I asked Gemini about the top 10 ranking factors in Google. You can see what it said. According to Gemini, backlinks and