UTM Content
UTM content is the optional URL parameter that distinguishes different creative elements or links within the same campaign for split-testing and attribution.
UTM content is the optional URL parameter utm_content that identifies a specific creative element, ad variant or link placement within a campaign, enabling you to compare performance between different versions pointing to the same destination.
What UTM Content Means in Marketing
The other four UTM parameters answer where traffic came from and which campaign sent it. UTM content answers which specific version of the creative or which specific link. It is the parameter for creative testing and multi-link attribution.
If you’re running two banner ad designs in the same Google Display campaign, utm_source, utm_medium and utm_campaign will be identical for both. Without utm_content, your analytics shows combined data and you have no way to know which banner is driving conversions. Adding utm_content=banner-version-a and utm_content=banner-version-b to each version’s URL splits the data cleanly.
The same logic applies inside email. A single newsletter might include three links to the same landing page: one in the header image, one in the body copy and one in the footer. All three share the same source, medium and campaign values. UTM content is what lets you see which placement drives clicks, which is useful data for deciding where to put your most important call to action.
The full UTM parameters system is covered on its own glossary page.
How UTM Content Works
The parameter. Added to a URL as ?utm_content=version-a, combined with the other UTM values: ?utm_source=newsletter&utm_medium=email&utm_campaign=october-sale&utm_content=header-link.
Analytics reporting. GA4 stores utm_content as a dimension. You can filter acquisition reports by content value, or build Exploration reports that break a campaign down by its content variants. This is where you read the A/B test: which utm_content value generated higher click rates, lower bounce rates or more conversions.
A/B testing with UTM content. If you split an email audience into two groups each receiving a different subject line or CTA button, tagging the versions with utm_content lets you attribute any downstream behaviour difference to the creative change rather than to noise. It is not a substitute for statistical significance testing in your email platform, but it gives you the analytics dimension to analyse post-click behaviour by variant.
Naming conventions. The same discipline that applies to utm_campaign applies here: agree a naming convention, document it, use lowercase and hyphens. Creative test variants are easy to name consistently: cta-version-a, cta-version-b. Link positions within a single email are also consistent: header, body, footer.
UTM Content Example
A brand sends a promotional email with two calls to action: a top banner linking to a product page, and a text link in the body. Both point to the same URL, but the banner link has utm_content=banner-cta and the text link has utm_content=body-text-link. In analytics, 65% of conversions are attributed to the banner and 35% to the body link. The brand uses this to prioritise the banner’s design and placement in future sends.
Why UTM Content Matters for Marketers
UTM content is what turns multi-link and multi-variant campaigns from guesswork into data. Without it, you know a campaign worked but not which part. With it, you can allocate creative effort to the elements that actually drive results and eliminate the ones that don’t.
Frequently Asked Questions
When should I use UTM content?
Use it when you have two or more versions of the same campaign that could produce the same UTM source, medium and campaign values. The most common case: A/B testing two versions of an email with different calls to action, or running two banner ad designs pointing to the same landing page. Without utm_content, both versions blend into a single row in your analytics and you can't tell which performed better.
What values should I put in UTM content?
Describe the creative element that distinguishes this link from others in the same campaign. For email testing: 'cta-buy-now' versus 'cta-learn-more'. For display ads: 'banner-blue-300x250' versus 'banner-red-300x250'. For multiple links in one email: 'header-link' versus 'body-link-1' versus 'footer-link'. The value should be specific enough that you know exactly what it refers to when you see it in an analytics report weeks later.
Is UTM content required?
No, it is optional. You only need it when you want to distinguish between creative variants or link placements within an otherwise identical UTM set. If a campaign has only one creative execution and one link per channel, utm_content adds no value. The required parameters for full attribution are utm_source and utm_medium. UTM campaign is strongly recommended. UTM content and UTM term are situational.
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