Same Content, Multiple Addresses?
When you run a website, a single page often opens under several different URLs. The addresses below may be the same page to you, but Google can see them as separate pages:
example.com/menuexample.com/menu/example.com/menu?utm_source=instagramwww.example.com/menu
This situation — same content, different URLs — is called 'duplicate content'. Google gets confused about which address to show in search results, and your ranking can suffer because the value is split across several URLs.
What a Canonical Tag Does
A canonical tag tells Google "out of all these addresses, this one is the real, preferred version." It sits as a single line inside the page's <head>:
<link rel="canonical" href="https://example.com/menu" />
Once set, Google consolidates the value of all those scattered URLs onto one preferred address. Your ranking — plus the trust built up from reviews and links — all gets focused in one place.
When It Really Matters
- When you add UTM tags to ad and social links: tracking tags create extra URLs for the same page.
- Online stores with product filters and sorting: new URLs keep being generated by colour, size, and so on.
- When www and non-www, or http and https, are mixed together.
- When a blog post appears under multiple categories.
Quick Checklist
- Make sure every page has a canonical tag.
- Write the preferred address as an absolute URL (the full address starting with https://).
- Keep only one canonical tag per page.
- Check the 'Pages' report in Google Search Console for any 'duplicate' warnings.
Canonical tags are invisible, but they're an important safeguard that stops all your hard-earned SEO effort from leaking away. At PICKTECH we handle canonical setup and URL clean-up right from the build stage, so if this feels complicated, feel free to get in touch.