Fill in the blank:Actionable insights can be described as explaining the______of an online marketing campaign.

Actionable insights explain the 'why' behind an online marketing campaign's performance. They go beyond simply reporting what happened (e.g., "sales increased") to uncover the underlying reasons for those results (e.g., "sales increased because the new ad creative resonated with our target audience, leading to higher click-through rates"). This understanding allows marketers to make informed decisions and optimize future strategies. 'How' describes the methods or tactics used, but not the reason for their success or failure. 'When' refers to the timing of events, which is a descriptive metric, not an insight into causality.