---
title: "What are canonical tags?"
description: "What are canonical tags?"
author: "Anubhav Sharma"
published: 2026-02-15
updated: 2026-02-15
canonical: https://www.mindstick.com/interview/34454/what-are-canonical-tags
category: "SEO"
tags: ["seo", "seo company"]
reading_time: 3 minutes
---
# What are canonical tags?
A **canonical tag** is an HTML element that tells search engines which version of a page is the “main” or **preferred URL** when multiple URLs have similar or duplicate content.
It helps prevent duplicate content issues and ensures search engines rank the correct page.
## Why Are Canonical Tags Important?
Search engines like Google may find multiple URLs with the same content, for example:
```plaintext
https://example.com/product
https://example.com/product?ref=facebook
https://www.example.com/product
```
Without a canonical tag, search engines may:
- Split ranking signals between versions
- Choose the wrong URL to index
- Reduce SEO performance
- Canonical tags solve this.
## How Does a Canonical Tag Look?
It is placed inside the `` section of a page:
```html
```
This tells search engines:
> “This is the original and preferred version of this page.”
## When to Use Canonical Tags
- Duplicate product pages
- URL parameters (tracking codes)
- HTTP vs HTTPS versions
- WWW vs non-WWW versions
- Similar content across categories
## Simple Definition
A canonical tag tells search engines:\
**“Index this version of the page, not the others.”**
It improves SEO by consolidating ranking signals and avoiding duplicate content problems.
## Answers
### Answer by Anubhav Sharma
A **canonical tag** is an HTML element that tells search engines which version of a page is the “main” or **preferred URL** when multiple URLs have similar or duplicate content.
It helps prevent duplicate content issues and ensures search engines rank the correct page.
## Why Are Canonical Tags Important?
Search engines like Google may find multiple URLs with the same content, for example:
```plaintext
https://example.com/product
https://example.com/product?ref=facebook
https://www.example.com/product
```
Without a canonical tag, search engines may:
- Split ranking signals between versions
- Choose the wrong URL to index
- Reduce SEO performance
- Canonical tags solve this.
## How Does a Canonical Tag Look?
It is placed inside the `` section of a page:
```html
```
This tells search engines:
> “This is the original and preferred version of this page.”
## When to Use Canonical Tags
- Duplicate product pages
- URL parameters (tracking codes)
- HTTP vs HTTPS versions
- WWW vs non-WWW versions
- Similar content across categories
## Simple Definition
A canonical tag tells search engines:\
**“Index this version of the page, not the others.”**
It improves SEO by consolidating ranking signals and avoiding duplicate content problems.
---
Original Source: https://www.mindstick.com/interview/34454/what-are-canonical-tags
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