I will be clear.
Unless you have experience , it is not worth investing a minute to understand how advertising platforms work.
Outsource the service to an agency or freelance that you know works well and pay what they ask.
It is very easy to analyze the ROI of an agency based on the leads and sales generated by its actions.
Advertising platforms are constantly changing and agency professionals are updated, they have agreements with networks and their time is more efficient than yours, so don't hesitate and outsource it.
If you don't know of any, talk to us as we have agreements with several agencies and we will recommend the one that best suits your needs.