The instructions below detail how to enable the HubSpot integration.
Navigate to your Account Settings.
Click on Integrations.
Under CRM options, click the Connect button under HubSpot.
Log in to your HubSpot account and click Grant Access.
Back on the integrations page, check the box next to Automatically create contacts. This will ensure that contacts are automatically created in HubSpot whenever an email recipient clicks on a signature campaign.