What are the key metrics to track in ecommerce performance marketing?

The key metrics to track in ecommerce performance marketing are:
– Conversion Rate: Percentage of visitors who complete a desired action (e.g.: purchase).
– Average Order Value (AOV): Average amount spent per order.
– Customer Acquisition Cost (CAC): Cost to acquire a new customer.
– Return on Ad Spend (ROAS): Revenue generated for every dollar spent on advertising.