Duplicate content is one of those SEO problems most sites have without realizing it.
Same page, different URLs — and Google gets confused about which one to rank.
A canonical tag solves this by telling search engines which version is the “main” page:
<link rel="canonical" href="https://example.com/page" />
Instead of splitting ranking signals, everything points to one URL.
With a canonical tag checker, you can quickly:
* Detect missing tags
* Fix wrong canonical URLs
* Avoid SEO loss
Use it especially after migrations, filters, or URL changes.
👉 Simple check, big SEO impact. https://mtkits.com/canonical-tag-checker