In Salesforce, create a Campaign. Copy the Campaign ID, and set as the default value for this field, Campaign ID, below:
Submissions will create Lead records and Campaign Member records attached to this specific campaign. 

You can customize 2 questions with the template for open text responses. Each is limited to 100 characters. Contact Salesforce team to make any changes. These responses will be populated on the Lead Record and Campaign Member record in the Description field.

Make sure to update the Notifications section:

1. Who should get response reports? Decide if PDF of response is necessary.
2. What should respondents see when they submit? Acknowledgement or Redirect
3. What email confirmation should get sent out after they submit?