Dynamic UTM Parameters Builder for LinkedIn Ads

How to build LinkedIn dynamic UTM parameters

LinkedIn dynamic UTM parameters are values like {{CAMPAIGN_NAME}} that Campaign Manager swaps for the real name or ID on every click. This builder follows LinkedIn's URL tracking parameters help page: capital letters, double curly brackets, and only the characters LinkedIn accepts. Then it shows the GA4 channel your clicks will get.

1. Say which names your account shows. If you see “ad sets”, keep the new names. If you still see “campaign groups”, pick the old names — the tool writes the matching values.
2. Choose where the parameters go. Account level tags everything at once. One ad set (a campaign in older accounts) tags just its ads. A single ad can only take fixed values.
3. Mind LinkedIn's character rules. Values may only use letters, numbers, _, + and -. LinkedIn's own example writes spaces as +, but GA4 turns + back into a space, so stick to underscores.
4. Copy the key and value table. Campaign Manager asks for each key and its value separately; the one-line string is there for your notes, the API and the preview.
5. Converting an old setup? Switch to “Check or convert”, paste the string you used before October 2025, and copy the version with the new names.

What to do next in Campaign Manager

1. Open the level you chose. For everything at once, use the ad account's URL tracking parameters. For one group of ads, edit the ad set — in accounts that still show campaign groups, that is the campaign. Fixed values for one ad go on the ad.
2. Add one key and value per row. Type each key from the table, then its value. Dynamic values are typed exactly as shown, braces included.
3. Remember how levels add up. LinkedIn combines account, campaign and ad parameters into one string. Campaign parameters don't remove anything already in the ad's destination URL, so don't put the same key in both places.
4. Click a live ad and look at the address bar. You should see real names instead of braces, plus li_fat_id if enhanced conversion tracking is on.
5. Check GA4 the next day. Open Traffic acquisition and look for linkedin / paid_social in the Paid Social row.

Common LinkedIn URL parameter errors

Old names like {{CREATIVE_ID}} and {{CAMPAIGN_GROUP_NAME}}

Strings saved before October 2025 often still use the creative and campaign group names. LinkedIn switched existing ad sets for you, but when you create or edit an ad set you must use the new names. Paste the old string in convert mode to get {{AD_ID}} and {{CAMPAIGN_NAME}}.

{{CAMPAIGN_ID}} now reports a different level

This one kept its spelling but changed meaning: it used to send the middle level and now sends the top level. LinkedIn switched existing ad sets for you, so live setups keep reporting the same level. The risk is a string you copy from old notes into a new or edited ad set — there, {{CAMPAIGN_ID}} now means something else. Use {{AD_SET_ID}} for the middle level.

Why LinkedIn UTM parameters are missing in GA4

Usually the value was written {{campaign_name}} or {CAMPAIGN_NAME}. LinkedIn only fills in capital letters inside two braces on each side, so GA4 receives the braces as plain text — or nothing useful at all.

Spaces, dots or % signs in a value

LinkedIn's value field takes letters, numbers, underscores, plus signs and hyphens only. spring.sale and 50%off are refused. LinkedIn's own example uses + for a space, but GA4 then shows a space, so underscores give cleaner reports.

Dynamic values added to a single ad

LinkedIn accepts dynamic values on the account or a campaign, not on one ad. Move the dynamic keys up a level and leave the ad with fixed values such as an offer code.

The click ID removed by a redirect

Some landing page tools and redirects drop unknown parameters. If li_fat_id disappears, LinkedIn's Conversions API can't match offline leads to the click.