LinkedIn Insight Tag: how to install it and check it still works

The LinkedIn Insight Tag is a JavaScript snippet that reports visits on your site to LinkedIn, so Campaign Manager can attribute conversions, build retargeting audiences and show the professional demographics of your visitors. You install it once per site, in the page template or through Google Tag Manager, and it identifies the ad account with a numeric partner ID.

For a B2B client running LinkedIn Ads, the rest of the account depends on it. When the tag disappears, conversions drop to zero and the ad account doesn't say why.

What the tag does for a LinkedIn Ads account

Conversion tracking is the main reason to install it. You define a conversion in Campaign Manager, for example a visit to a thank-you page, and LinkedIn credits it to the campaign the member saw or clicked. The same data feeds website audiences for retargeting, and the website demographics report, which breaks visitors down by job function, industry and company size for the members LinkedIn can match.

What the code looks like

The standard snippet declares your partner ID and loads a script from LinkedIn's CDN:

<script type="text/javascript">
_linkedin_partner_id = "1234567";
window._linkedin_data_partner_ids = window._linkedin_data_partner_ids || [];
window._linkedin_data_partner_ids.push(_linkedin_partner_id);
</script>

It continues with a loader that injects https://snap.licdn.com/li.lms-analytics/insight.min.js, and a <noscript> image pointing to px.ads.linkedin.com for browsers without JavaScript. Copy the full snippet from Campaign Manager rather than retyping it, and add it to every page before the closing </body> tag.

Note the partner ID. It's how you tell whether the tag on a site belongs to your client's account or to a previous agency's.

Installing it through Google Tag Manager

GTM has a built-in tag type called LinkedIn Insight. Create the tag, paste the partner ID and fire it on all pages, or on the consent trigger your CMP setup uses. It's usually the tidier option, because the tag follows the same consent rules as GA4 and the other pixels. Pick one method, not both.

For conversions with no thank-you page, such as a form that submits in place, fire LinkedIn's event-specific call on the event: window.lintrk('track', { conversion_id: 1234567 });.

How to check the tag is active

Campaign Manager shows whether LinkedIn is receiving data from the tag, but not in real time, so use the browser for a quick check. Open DevTools, go to the Network tab, filter on linkedin and reload. You should see insight.min.js load from snap.licdn.com, then requests to px.ads.linkedin.com. Disable your ad blocker first, since most of them block this script. To test a conversion, complete the action yourself and look for a new request to px.ads.linkedin.com right after it.

Consent and the cookie banner

The Insight Tag sets advertising cookies, so on UK and EU sites it normally sits in the marketing category of the CMP and loads only after consent. Test both paths, accepting and refusing. A misconfigured banner can block the tag for everyone, including visitors who say yes, so if conversions fall right after a banner change, look there first. Our guide to cookie banner monitoring covers how CMP swaps go wrong.

What usually breaks it

None of these show an error on the page:

• a redesign or new theme that drops the snippet from the template
• a new GTM container published without the LinkedIn tag, or with a mistyped partner ID
• a CMP swap that puts the tag in a category whose trigger never fires
• landing pages on a builder or subdomain that doesn't load the container

Catching it when it disappears

Checking the network tab by hand doesn't scale across client sites and deploys. Deltio reads the page source of each monitored URL, detects the LinkedIn Insight Tag along with GA4, GTM, Meta Pixel and others, and sends an email or Slack alert when a tag appears or disappears. If LinkedIn runs inside GTM, Deltio sees the container instead and alerts if it goes missing or its ID changes, but it can't see which tags are published inside it. It also flags a change of CMP on the home page.

It doesn't confirm that conversions fire or that Campaign Manager receives them, so repeat the manual test after any change to forms. More on this in marketing tag monitoring and how to check GA4 is installed.

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