AdTech/MarTech Product Managers, what does your work look like?

Looking to understand more about this specific segment of product, would love an overview of what you do. What does your product actually do? Is it a platform, a tool, a data layer, or something else? Who are your primary users: marketers, engineers, data analysts? Where does your product sit in the funnel. Are you upstream (data/identity), in the middle (activation/targeting), or downstream (reporting/attribution)? <