How to get Amazon campaign working correctly?

I’ve tried to get an Amazon Ad Campaign up and running on Seller Central but I’m confused because, whilst the campaign is flagged as “Delivering” under the Campaign Manager section of Seller Central, I am not seeing any data on the charts to suggest that any clicks have been made. Also, I have not had any charges. To me it looks like the campaign is not actually active and that I’ve done something wrong in its setup.

Any ideas what I can do to get this campaign running properly? I guess what I’m imagining I should see is that my product ad shows up in search results as “Sponsored” and that I’ll get charges for some clicks on this.