There are some very important questions every AdTech marketing users wants to know that for their marketing campaign with X$ of budget with selected targeting tactics and a selected time-period, what will be Overall impressions served. What will be unique user reach. What will be his average CPA [cost per acquisition] These questions are difficult to answer as they require a complex forecasting system to answer this. This forecasting system becomes complex because of amount of data and multivariant features involved because of many targeting tactics.