Why Marketing Metrics Matter
Without clear metrics, you can’t scale efficiently. Performance marketing relies on data to make decisions.
1. CPI (Cost Per Install)
Definition: Cost to acquire one app install.
Formula:
CPI = Ad Spend / Number of Installs
Use CPI to evaluate:
2. CPA (Cost Per Acquisition)
Definition: Cost to acquire a paying customer or lead.
Formula:
CPA = Ad Spend / Conversions
CPA is more valuable than CPI because it reflects real business outcomes.
3. LTV (Lifetime Value)
Definition: Total revenue generated by a user over time.
Key factors:
LTV helps determine how much you can afford to spend on acquisition.
4. ROAS (Return on Ad Spend)
Definition: Revenue generated per dollar spent.
Formula:
ROAS = Revenue / Ad Spend
Track:
How These Metrics Work Together
Golden rule:
LTV must be higher than CPA for sustainable growth.
Common Pitfalls
Strong performance marketing depends on understanding the relationship between cost, value, and revenue. The right metrics help you scale confidently.
Without clear metrics, you can’t scale efficiently. Performance marketing relies on data to make decisions.
1. CPI (Cost Per Install)
Definition: Cost to acquire one app install.
Formula:
CPI = Ad Spend / Number of Installs
Use CPI to evaluate:
- Channel efficiency
- Creative performance
2. CPA (Cost Per Acquisition)
Definition: Cost to acquire a paying customer or lead.
Formula:
CPA = Ad Spend / Conversions
CPA is more valuable than CPI because it reflects real business outcomes.
3. LTV (Lifetime Value)
Definition: Total revenue generated by a user over time.
Key factors:
- Retention
- Monetization
- Engagement
LTV helps determine how much you can afford to spend on acquisition.
4. ROAS (Return on Ad Spend)
Definition: Revenue generated per dollar spent.
Formula:
ROAS = Revenue / Ad Spend
Track:
- Day 1 ROAS
- Day 7 ROAS
- Day 30 ROAS
How These Metrics Work Together
- CPI tells you acquisition cost
- CPA shows conversion efficiency
- LTV defines user value
- ROAS measures profitability
Golden rule:
LTV must be higher than CPA for sustainable growth.
Common Pitfalls
- Focusing only on CPI instead of CPA
- Ignoring long-term LTV
- Not segmenting users by cohort
- Making decisions on incomplete data
Strong performance marketing depends on understanding the relationship between cost, value, and revenue. The right metrics help you scale confidently.
