First, head over to https://app.datatrics.com/integrations/linkedin/. Click on the "Install" button, and you will be redirected to the settings screen:

Now click on the Connect to LinkedIn button. You will be redirected to LinkedIn; please enter your login credentials if you aren't logged in yet.

After logging in and authorizing Datatrics, you will be redirected back to the settings page in Datatrics. You can now select a LinkedIn Ads account from the dropdown menu and click on Save Settings.

Datatrics will use the LinkedIn Ads integration to sync segments to LinkedIn via the LinkedIn Insight Tag. Make sure you have this tag/pixel added to your website.