Evaluate the effectiveness of the ad set scaling strategies in the following scenarios:
- Scenario I: A skincare brand incrementally increases its ad spend in new demographic segments while closely monitoring engagement rates and tweaking the ad copy accordingly.
- Scenario II: An online bookstore uses the same ad creative across all age groups but adjusts the targeting parameters and budgets rapidly based on initial response rates.
- Scenario III: A fitness app employs Dynamic Creative Optimisation (DCO) to adapt its ads for different user interests, gradually increasing bids in segments showing higher engagement.
- Scenario IV: A travel agency aggressively expands its reach to new geographical markets without segment-specific ad adjustments, relying on general brand appeal.
Select scenarios that show effective ad set scaling strategies: