A UTM naming convention is a fixed pattern for five parameters, written in lowercase with hyphens, that everyone on the team copies exactly. The pattern is the standard. If two people can build the same link and get different results, you don't have a standard yet.
TLDR: Always lowercase. Use
utm_sourcefor the platform,utm_mediumfor the type of traffic,utm_campaignfor the effort,utm_contentfor the creative andutm_termonly for paid keywords. Lock the allowed values in a shared list and build links from a template, never by hand.
The five parameters and the rule for each
| Parameter | Rule | Example |
|---|---|---|
| utm_source | The platform, one fixed name each | instagram, linkedin, tiktok |
| utm_medium | Type of traffic, from a short list | social-organic, social-paid, bio-link |
| utm_campaign | Year-month-name, hyphenated | 2026-10-spring-launch |
| utm_content | Creative or format and variant | carousel-a, video-hook-2 |
| utm_term | Paid keyword or audience, if any | lookalike-1pct |
Source and medium decide how GA4 groups your traffic into channels. Get those two wrong and the rest of your data ends up in the wrong place.
Four rules that prevent most damage
- Lowercase only. GA4 reads Instagram and instagram as two sources.
- Hyphens, not spaces or underscores, inside values. Spaces turn into
%20and make reports unreadable. - No personal data in any value. UTMs sit in URLs, browser history and server logs.
- No UTMs on links within your own site, because they overwrite the real source of the visit.
Pick the campaign name pattern once
The campaign name is the one that travels furthest, from link to report to finance review. Use a pattern that sorts naturally: year-month-name, for example 2026-10-spring-launch. Add a region code only if you run the same campaign in several markets, such as 2026-10-spring-launch-de.
Match this value to the campaign field in your tagging schema. When the post tag and the link tag use the same string, you can join platform results with site results without a lookup table.
A template your team can copy
Write the base link and the pattern once, then fill in the blanks:
https://example.com/offer?utm_source=[platform]&utm_medium=[medium]&utm_campaign=[year-month-name]&utm_content=[creative]
Keep a one-page sheet with the allowed values for source and medium. Anything not on the sheet needs approval from one named owner. Without that owner, a "quick new medium" appears every month.
Fix the three mistakes that show up first
- Link-in-bio traffic labelled as organic social. Give your bio link its own medium, such as
bio-link, so it stays separate from post links. A link-in-bio page with its own tracking makes this easy. - Different people, different spellings. Share one generator, not a style guide people have to remember.
- Reused links. Reusing last quarter's tagged link in this quarter's post credits the wrong campaign. Build a fresh link for every campaign.
If your numbers are already broken, our post on why multi-brand UTM tracking turns inconsistent shows how to diagnose it, and automating UTM tracking covers the build.
Check the standard with a 15-minute audit
Open GA4, filter to the last 30 days of social traffic and look at the source and campaign lists. Count the values that differ only by case, spelling or a trailing character. Each one is a place where your standard failed. One audit like this usually finds the two or three habits to fix.
Document the exceptions before they happen
Every team hits cases the pattern does not cover: an influencer link, a partner newsletter, a QR code on a poster. Decide the values now. Influencer posts get utm_medium=influencer and the creator's handle in utm_content. QR codes get utm_medium=qr with the placement in utm_content, such as window-poster. Write each case on the same one-page sheet, with one example link, so nobody invents a new medium at 5 pm on a launch day. A short list of exceptions with examples is far easier to follow than a long rulebook, and it keeps your reports readable a year from now when the person who wrote the rules has moved on.
Apply it to next week's posts
Write the allowed sources and mediums on one page today. Then build every link in next week's schedule from the template and check the first five in GA4 real-time before the rest go out. Mydrop's calendar keeps the final link attached to each scheduled post, so your team can see exactly what was published.
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