> ## Content Index > Fetch the complete content index at: https://getpublii.com/dev/llms.txt > Use this file to discover other available public pages before exploring further. # {{canonicalLink}} helper - URL: https://getpublii.com/dev/canonicallink-helper/ - Published: 2017-08-04T22:10:47.292Z - Updated: 2024-02-08T11:50:19.352Z - Description: Generates link element with URL to the canonical version of the specific page. Syntax: {{canonicalLink}} This helper has no additional params. Example output: ``` The `{{canonicalLink}}` helper should be used in the `` section of the website. Canonical links are used to recognise the base URL for a group of pages with the same content, but available under different URLs. It is a simple way to avoid duplicate content which can affect your website SEO. You can also set a custom canonical URL [under post settings](https://getpublii.com/docs/adding-editing-and-deleting-posts.html#adding-editing-and-deleting-posts). **This helper do the following operations:** If the subpage is set to be not indexed - it returns empty value as canonical URLs are unnecessary when the page is set to noindex. For other cases it returns the current URL or URL overrided under post settings.