(Including Substack, Medium, LinkedIn, WordPress.com & more)
Publishing across multiple platforms is one of the smartest ways to grow your audience today. Creators often publish on:
- Their own website (Squarespace, WordPress, Webflow, Shopify blog, etc.)
- Substack
- Medium
- LinkedIn Articles
- WordPress.com
- Ghost
- Tumblr
- And other syndicated networks
This is great for reach, but it raises a critical SEO question:
What happens when the same article appears in multiple places?
Let’s walk through what Google does, what you should do, and what to avoid.
How Google Handles Duplicate Content
When Google finds the exact same article on several URLs, it tries to decide:
- Which one is the original
- Which one is the most authoritative
- Which one should appear in search results
Google does not want to show duplicates. So if your article exists on your website and on a high-authority platform (Substack, Medium, LinkedIn), Google may decide that their version is the primary one.
If that happens:
- Your website may not rank for your own article
- Your SEO gains go to the other platform
- Your traffic goes elsewhere
- Your domain authority does not benefit
This is especially common when your site has moderate authority but the platform you’re cross-posting to is extremely strong.
Canonical URLs: The Ideal Solution
A canonical URL (rel="canonical") tells Google exactly which version should be considered the main/original one.
In a perfect world, you would:
- Publish the full article on your website
- Republish on other platforms
- Set the canonical URL on those republished versions to point back to your website
Platforms like Medium support this directly.
The Problem: Many Platforms Don’t Support Canonical URLs
Some of the most popular creator platforms do not allow you to set canonical URLs, including:
- Substack
- LinkedIn Articles
- Many newsletter tools
- Some WordPress.com setups
- Some community blogging platforms
Because of this limitation, you cannot directly tell Google:
“The version on my website is the original.”
If you publish the same full article in both places, Google is left to guess, and the high-authority platform often wins.
Two Safe Approaches for Cross-Posting
Below are the only two approaches that avoid harming your website’s SEO.
⭐ Option A (Safest): Full Post on Your Website + Excerpt/Teaser Everywhere Else
This method always preserves your SEO.
- Publish the full article on your website.
- Publish a shorter version on Substack/Medium/etc.
- Link prominently to the full article on your website.
Why this is the safest approach:
- No duplicate full content = Google sees only one full version
- Your website remains the authoritative source
- You still grow your audience on other platforms
- You avoid any risk of the platform outranking you
This is the method recommended by SEO professionals when canonical URLs are unavailable.
Option B (Helpful but NOT Reliable): Publish Everywhere But Make Your Preferred Version Clear
This is the “soft signal” method.
What you do:
- Publish on your website first.
- Republish the full article on Substack/Medium/etc.
- Add a line such as:“Originally published on https://YourWebsite.com.”
- Link back to your site.
- Keep your internal links pointing to the version on your website.
- Important: This is NOT a guaranteed SEO safeguard.
This method may help in some cases, like if:
- Your site already has strong authority
- The platform repost doesn’t get many backlinks
- You published your version significantly earlier
But it is not equivalent to a canonical tag. Google treats this as a hint, not a rule. On high-authority platforms like Substack, Medium, or LinkedIn, Google can still decide their version is primary.
If that happens:
- Your Substack audience grows
- But your website receives no SEO benefit
- Your version may not rank at all
This is why Option B is useful but not reliable.
What You Should Not Do
Do not publish the same full article on your website and on a platform like Substack with no canonical tag and no differentiation.
In that scenario:
- Google must choose a “winner”
- Google often picks the higher-authority domain
- Your website likely loses all SEO benefits
This is the riskiest approach and the easiest way to unintentionally hurt your search presence.
Summary
If you want to publish your content across multiple platforms and protect your SEO:
- Always publish the full version on your website first
- Use excerpts/teasers on platforms without canonical support (best practice)
- Only use the full-repost method if you understand the risks
- Remember: attribution is a hint, not a protection
With a thoughtful strategy, you can grow your reach everywhere and strengthen your website’s visibility without accidentally competing with yourself in Google search.
