How to Increase Your Conversion Rate?

I think going from a 7% conversion rate to, what do you say, 40% at some point is absolutely insane. So for example, for white bundles, what I did was simple. First of all, I didn't have an onboarding. So the onboarding will just show people how to use the app. And once you got traction with Wide Bundle, like what was your marketing? Like how did you grow besides improving conversions?