You'll need an existing campaign, click here to learn how to create one.
HubSpot integration fails
You need to workflows enabled on your account (HubSpot marketing plan) and you must have admin permission in your HubSpot account.
The contact didn't appear
If a contact couldn't be added to a campaign you will get an email 15 minutes after trying to add it telling you why. Often it is because the contact doesn't have all the required fields for the campaign. A contact needs: First and last name, Street address, Postcode, State, and Country.
The US the state must be the two letter state name.
Check the history tab of the workflow to see why it may not have been added.