A prospect's first touch campaign is the campaign that is associated with the prospect when they are created in Marketing Cloud Account Engagement. This campaign can be set using completion actions, which are actions that Marketing Cloud Account Engagement executes after a prospect successfully completes a desired activity, such as submitting a form or clicking a custom link1. Completion actions can be configured to change the prospect's campaign to the one that is associated with the form or custom link

In order to send an autoresponder email, you need to create an email template in Marketing Cloud Account Engagement and select the option "Autoresponder emails" under "Available For". An email template is a preformatted email that you can use to create and send emails quickly and easily. An autoresponder email is an email that is triggered automatically whenever a prospect engages with your marketing assets, such as filling out a form or downloading a file

Default roles are included with Marketing Cloud Account Engagement and cannot be edited or deleted2. Custom roles can be edited and deleted, and can be created from scratch or from a default role2. Custom roles allow you to customize the access and permissions for different types of users in your organization2