1.3 CanonicalisationMediumInferred
Missing canonical tag
A self-referencing canonical is cheap insurance. Without one, Google has to guess which URL is the real version when parameters, trailing slashes or letter case create variants, and I would rather make that call myself.
What it is
No rel=canonical present.
Why it matters
Without a hint, Google guesses the canonical, sometimes wrongly, splitting signals.
How to fix it
Add a self-referencing canonical on each indexable page.
How to find it on your site
- View source and check for a rel=canonical link in the head.
- Crawl the site and flag pages with no canonical at all.
- Confirm whether parameters or trailing-slash variants could create duplicates of the page.
- Add a self-referencing absolute canonical to each indexable page.
Cross-reference to ranking and citation factors
A clear canonical consolidates duplicate signals onto one URL. Without it, signals can scatter across variants and weaken the page.
Impact
Medium; consolidation reliability. Inferred.
Evidence
Canonical tags signal the preferred URL. Google Search Central, Consolidate duplicate URLs (canonicalization)