PostHog shows fewer LinkedIn signups than Campaign Manager

1. View-through conversions

   LinkedIn credits members who saw an ad inside the view window and signed up without clicking. PostHog never sees the view, so those signups count as direct or organic.

2. The LinkedIn rule counts something else

   A conversion set to fire when a URL like /signup loads counts visits to the form, not finished signups. PostHog counts the account your app created.

3. Phone to desktop

   Members click on their phone and sign up at their desk. LinkedIn ties both to one member; PostHog sees a new person with no UTMs.

4. Long click window

   A click in week one and a signup through Google weeks later is LinkedIn in Campaign Manager and Google in PostHog.

1. Split post-click from view-through

   In Campaign Manager open Columns, Conversions and leads, and add post-click and view-through conversions separately. Compare PostHog with post-click only.

2. Check what the LinkedIn conversion counts

   In Campaign Manager go to Analyze, Conversion tracking and open the conversion. Confirm it fires on the finished signup, not on the form page.

3. Break PostHog signups down by source

   In PostHog create a Trends insight on your signup event, break it down by Initial UTM source and filter to LinkedIn values.

4. Judge on activation, not signups

   Build a PostHog funnel from signup to your activation event, broken down by Initial UTM source, and compare cost per activated user.

Steps checked against LinkedIn Marketing Solutions Help: LinkedIn conversion window; LinkedIn Marketing Solutions Help: Conversion tracking reporting; PostHog docs: Capturing UTM and campaign data; PostHog docs: Funnels.