How To Use Utm Parameters
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The five UTM parameters
UTM parameters are the five query-string tags you bolt onto a URL so your analytics tool knows where the traffic came from. Without them, everything from a newsletter, a podcast sponsorship, a tweet, and a friend’s blog post shows up as “direct” or “referral” — you have no idea which campaign actually drove the signup.
What each parameter actually means
Used consistently, UTMs turn marketing from a guessing game into a measurable system. Used inconsistently, they create a data mess that takes weeks to clean up. This guide covers what each parameter does, how to name them so the data stays sane, and the mistakes that destroy reporting.
Build URLs with a consistent scheme
Lowercase everything. Use hyphens between words (utm_campaign=spring-sale-2026, not Spring_Sale_2026). Keep the source short and human (twitter, not twitter-feed-link). Put the date or quarter in the campaign name if you run recurring campaigns — it lets you compare year-over-year without renaming everything. Document the scheme in a shared doc so new teammates don’t invent their own format.
A naming convention that scales
If your landing page redirects (301 or 302) to a different URL, some analytics setups lose the UTM parameters on the redirect. Test a tagged link yourself before you hit publish — click it, land on the page, and confirm the UTMs show up in your real-time analytics.
Where to put UTMs — and where not to
Two versions of the same link — one with utm_content=button-top, the other button-bottom. Same campaign, same source, same medium. Now the content breakdown tells you which version drove more conversions. Use this for CTA copy tests, image tests, or subject line tests in email.