Install the AppExchange Application for Account Engagement

Before setting up your Salesforce connector, install the Account Engagement (Pardot) AppExchange package in your Salesforce org.

User Permissions Needed
To install the Pardot package:	Download AppExchange Packages (in Salesforce)

Important Don’t install the package directly from AppExchange. You must install the package as described here.

Get the installation link.
This package updates your Salesforce org with a custom application, custom tab, and custom fields under leads and contacts. To display all fields, modify your view.
Review actions, and click Install.
On Step 2 of the install wizard (Choose security level), select Grant access to admins only.