What are the key metrics for conversion-based optimization?

There’s no shortage of numbers you can track, but a few metrics are a must for serious optimization. Conversion rate: percentage of users completing a desired action. Cost per conversion (CPC): crucial for paid campaigns. Click-through rate (CTR): especially important for ads and email marketing. Average order value (AOV): to see if optimizations are bringing better sales. Time to conversion: how long it takes for a user to go from interest to action. Ideally, along with monitoring end goals, you're also looking at micro-conversions along the user journey.