What to search for and what to track:

• CPM £
• Amount Spent £
• Frequency
• Hook Rate %
• Hold Rate %
• Clicks 1.0
• Click Through Rate %
• CPC £
• Ad Efficiency 1.0
• Cost Per Acquisition/Result £
• Purchase / results
• Purchase Value
• ROAS 1X
• AOV £

CPM

Cost Per 1000 impression.

Impression = your ad being deliver to any feed (not unique)