Your Guide to Using Canonical Tags
A canonical tag, also known as a canonical link or “rel canonical”, is an HTML tag that helps search engines index the correct URL and avoid duplicate content.
Similarweb contributor Maayan Zohar Basteker has published an article featuring useful tips on using canonical tags
She says, “Here are 5 best practices to make sure your canonical tags are set up the right way:
1. Absolute URLs
Always use absolute URLs in canonical tags and not relative URLs to make sure that the search engine understands the tag correctly. An absolute URL includes the full web address, including the protocol (HTTP or HTTPS) and domain.
An absolute URL in a canonical tag in SEO looks like this:
<link rel=”canonical” href=”https://www.example.com/product-page” />
And a relative URL in a canonical tag looks like this:
<link rel=”canonical” href=”/product-page” />
2. One canonical tag per page
Using multiple canonical tags on a page can lead to conflicting signals, and Google may not interpret them as intended, or worse, Google might ignore them. To deal with this, limit each page to a single canonical tag.”
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