When your campaign is live on your website, you can follow its performance on your Campaigns page.
Every time a visitor sees the form step (not the teaser) of the campaign, it will count as one view.
When a visitor interacts with the call to action button of your campaign, it will count as a lead in the statistics.
The stats update automatically every two hours. But if you want to see the newest data, you can click the refresh button in the lower right corner: