The owner of the account and any user that has notifications set up for that campaign will receive an email every time you get a new lead.
Another way of being notified is via the mobile app, which you can download with the links below.
Here are the links to the mobile apps.
iPhone = https://itunes.apple.com/us/app/prospect-messenger/id1446213178?ls=1&mt=8
Android = https://play.google.com/store/apps/details?id=com.prospectmessenger.app