15 December, 2025
Track the One Meta Ads Metric That Actually Matters in the Andromeda Era
Meta's algorithm now controls who sees your ads. Narrow targeting is dead. The only input you still control? Creative diversity.
But here's the issue: you're probably not measuring it.
You might feel like you're testing different angles. You've got ads running across price, quality, social proof, problem-solution. But without quantifying diversity, you don't know if you're:
Actually diverse (or just running 15 variations of the same discount offer)
Improving over time (or regressing to safe, single-angle messaging)
Seeing performance gains because of diversity (or despite poor distribution)
Most brands track spend, ROAS, and CPA. Almost none track the creative distribution that Andromeda rewards.
Introducing the Simpson Diversity Index
Borrowed from ecology (where it measures species diversity), the Simpson Diversity Index quantifies how evenly your creative approaches are distributed across your active campaigns.
Here's what it tells you:
The lower the diversity score (i.e. <0.7) the more heavily your ad account is concentrated on 1-2 creative angles. Andromeda has limited opportunities to test different audience segments.
Higher diversity scores indicate you're well-distributed across multiple angles. The algorithm can efficiently find pockets of responsive users across different messaging approaches.
The question is how strong of a correlation is there between diversity and performance (i.e. cpa). The stronger the correlation the more you can lean into it as a leading KPI.
Template features
🎯 Automatic Creative Bucket Mapping - Define keywords once. Any ad containing those keywords auto-maps to the correct creative bucket. Supports up to 25 keywords per bucket, each bucket can have different amounts.
📊 Daily & Weekly Diversity Tracking - See your diversity score evolve over time. Spot when you're slipping back into single-angle reliance before it impacts performance.
📈 Correlation Analysis - Calculate the statistical relationship between your diversity and CPA. Get strength interpretation (Strong/Mild/None) and validation of whether diversity is driving your results.
💷 CPA Performance Mapping - Track CPA alongside diversity on the same charts. Visually identify when diversity drops correlate with CPA spikes.
📉 4 Pre-Built Dashboards
Daily diversity trend
Weekly diversity trend
Diversity vs CPA (dual-axis chart)
Current week creative distribution
🧪 6 Months of Demo Data See the template in action with realistic data showing the journey from low diversity (high CPA) to high diversity (low CPA).
Analytics and Reporting
