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What Is a UTM Link?
A UTM link is a URL with special tracking parameters appended to it. When someone clicks a UTM link, Google Analytics and other tools record exactly where that visitor came from — which platform, which campaign and which piece of content they interacted with.
UTM stands for "Urchin Tracking Module," named after the analytics company Google acquired in 2005 to build Google Analytics. Today it's the universal standard for campaign tracking across virtually every analytics platform.
The 5 UTM parameters
| Parameter | Purpose | Example |
|---|---|---|
| utm_source | Where the traffic comes from — the specific platform. | facebook, google, newsletter |
| utm_medium | The category of channel — how the traffic reached you. | cpc, email, social, banner |
| utm_campaign | The specific campaign name. Required for grouping. | spring-sale-2026 |
| utm_term | The paid search keyword (Google Ads). | running+shoes |
| utm_content | Differentiates A/B test variants or ad creatives. | header-cta-v2 |
Examples of well-built UTM links
Facebook ad campaign:
https://yoursite.com/sale?utm_source=facebook&utm_medium=cpc&utm_campaign=spring-sale&utm_content=video-ad-v2
Email newsletter:
https://yoursite.com/blog?utm_source=newsletter&utm_medium=email&utm_campaign=weekly-digest
LinkedIn organic post:
https://yoursite.com/about?utm_source=linkedin&utm_medium=social&utm_campaign=brand-awareness
UTM naming conventions that actually work
- Always lowercase. Google Analytics is case-sensitive.
Facebookandfacebookshow as two separate sources. This tool lowercases automatically. - Use hyphens, not spaces or underscores. Spaces become
%20in the URL and underscores render as word-joiners in some reports. - Be consistent. Pick a naming scheme and stick to it forever. Every marketer on your team should use the same values for the same channels.
- Keep it short. Shorter values are easier to type and read in reports.
fbnotfacebook-ads-campaign-paid. - Document your taxonomy. Maintain a spreadsheet of approved sources, mediums and campaign names so future you doesn't have to remember.
Do UTM links hurt SEO?
External UTM links are perfectly safe. Use them in ads, social posts, email campaigns and paid channels — that's what they're designed for.
Do not use UTM links for internal links on your own site. Each UTM combination creates a new URL that Google treats as a separate page. This causes duplicate content issues in Google's index and can split ranking signals. If you must use UTM links internally, add a canonical tag pointing back to the clean URL.
Common UTM mistakes
- Mixing case.
Facebook,facebookandFACEBOOKshow as three different sources. - Using spaces.
utm_campaign=spring salebecomesspring%20saleand breaks reports. - Adding UTM to internal links. Creates duplicate content in Google's index.
- Reusing the same campaign name for different promotions. Makes historical reporting useless.
- Forgetting utm_content. You can't distinguish which ad creative performed better without it.
- Mixing utm_source and utm_medium.
source=emailandmedium=newsletteris backward — source is the platform, medium is the category.
Frequently Asked Questions
What is a UTM link?
What are the 5 UTM parameters?
Are UTM parameters case-sensitive?
Facebook, facebook and FACEBOOK will show up as three different sources in your reports. Best practice is to always use lowercase for every UTM value. Our tool lowercases them automatically.Do UTM links hurt SEO?
What is the difference between utm_source and utm_medium?
utm_source is the specific platform (facebook, google, newsletter, twitter). utm_medium is the category of channel (social, cpc, email, organic, referral, banner). So a Facebook ad has source=facebook and medium=cpc. A Facebook organic post has source=facebook and medium=social.