The first 5 are commerce-specific, but the second 5 apply to all products.
- Purchase Rate
- Total Number of Purchases/Transactions
- Average Order Value
- Reduced Cart Abandonment Rate
- Reduced Calls to Support
- Registrations
- Click-Through Rate
- Time on Site/Engagement
- Number of Return Visitors/Return Visitors
- Net Promoter Score
More details on MeasuringU.