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

On this page you need to enter an API Key and an API token. To obtain them, you need to create a separate user in MailCampaigns via Administration > Users. After creating this user, the API Key and Token can be found in the user overview.

Enter the API Key and Token on the MailCampaigns settings page in Datatrics, and click on Save Settings.

To finish the integration, you need to perform some extra steps. These steps can be found in this MailCampaigns Help Center article.

Datatrics will use the MailCampaigns integration to sync profiles, hybrid campaign triggers and predictive profile fields (enrichment sync).