What's the One Metric That Takes Off?

I would suggest define your metric and try to go for a home run or a strikeout. What's an example of a metric that says this is taken off? I think that's different depending on the brand, you know, so if you have a subscription model, for example, you can spend a lot less up front. If you're doing something that is low LTV like maybe you only have one product yeah you gotta make your money back pretty quick.