Final answer:
To be notified when weekly revenue for a 'spring sale' campaign fluctuates by 10%, Intelligence Alerts are the most useful. They automate notifications when your set criteria are met, leveraging analytical intelligence for trend analysis.
Step-by-step explanation:
To monitor weekly revenue changes for a "spring sale" campaign, particularly to be notified of increases or decreases by 10%, you would find Intelligence Alerts most useful. These are automated notifications that can be set up within analytics tools to inform you of significant changes in your data based on predefined criteria. Secondary Dimensions allow you to refine your analytics within reports, Annotations let you make notes on the analytics timeline for future reference, and Real-Time data allows you to see current activity, but it is Intelligence Alerts that directly notify you when revenue fluctuates by the specified percentage. This is an application of analytical intelligence, which involves examining data and identifying trends, as opposed to practical, emotional, or creative intelligence, which are not directly related to data analysis.