How do I report an inappropriate ad?

You can find information on how to lodge a complaint here

https://www.collectiveshout.org/lodge_a_complaint

We've argued for over a decade that the current system of ad industry self-regulation is a failure, and have called for an overhaul. In the meantime, we still encourage you to make a complaint as Ad Standards has to respond. And it demonstrates community standards and adds pressure for them to respond appropriately. 

If the image appears to be illegal, or depicts a child, you can make an anonymous complaint to eSafety.