Ads marketing can be quite different depending on the audience, industry, and purpose of the campaign. For me, the main challenge is finding a balance between reaching enough people and making sure the message is actually relevant to them. Good targeting can reduce wasted impressions, but it is equally important to monitor the quality of traffic afterward. I also think reporting should be simple enough to show what is working without requiring hours of analysis. Different advertising platforms can provide very different results, so comparing placement quality, audience engagement, and overall costs is useful. https://dao.ad/ is one example of an ad platform that can be looked at when comparing different approaches to online advertising and campaign management.