This document discusses zero-based budgeting and its implications. Zero-based budgeting requires all expenses to be justified each period, starting from zero, rather than using previous budgets as a baseline. Clients are adopting it for strategic budgeting due to economic uncertainties. It means marketing teams must thoroughly research and justify budgets based on key performance indicators. The process impacts agencies, holding groups, and the creative process by requiring tighter briefs, shorter timelines, and focus on measurable ROI.