¿En qué momento durante el calendario de administración de campañas el anunciante tiene que establecer objetivos y KPI (indicadores clave de rendimiento)?

During the "Setup" phase of campaign management, advertisers define their goals and Key Performance Indicators (KPIs). This is a foundational step where the desired outcomes (e.g., brand awareness, sales, leads) are established, and measurable metrics (e.g., impressions, clicks, conversions, return on ad spend) are chosen to track progress towards those goals. Without clear objectives and KPIs set at the beginning, it's impossible to effectively optimize or report on campaign performance. "Review" and "Reporting" phases analyze performance against these pre-defined KPIs, while "Optimization" involves making adjustments to improve performance based on the KPIs.