To grow your startup, focus on three types of growth: sticky growth, viral growth, and paid growth.

Paid growth involves spending money to acquire users. It's important to ensure that the lifetime value of a customer exceeds the cost of acquiring them, or else the growth strategy may not be sustainable.

Sticky growth is about ensuring your existing users keep coming back and spending more. Delivering a good experience is crucial for retention.

Sticky growth means creating a product that users want to return to repeatedly, driving both activity and revenue.

Viral growth occurs when users have such a great experience that they recommend your service to others, leading to organic growth without additional costs.

Organic growth, which is growth that doesn't require payment, is often neglected by founders. For example, at Monzo, we reached a million customers before spending on direct marketing or advertising, primarily through virality and network effects.

As a startup grows, the focus shifts from just acquiring users to ensuring sustainable growth and revenue. We learned the hard way that even if users love our product, we must also pay attention to our overall growth metrics to avoid becoming a beloved startup that fails due to lack of financial viability.

In the early stages, focus on organic growth rather than paid users, as relying on paid growth can be misleading and should be avoided as much as possible.

Be cautious with paid growth, as it can be risky; if you pay for users who don't generate enough revenue, you could run out of money.