This is a difficult question to answer, as success can mean different things to different people.
For some, success might mean generating a lot of revenue or becoming profitable. For others, it might mean making a difference in their industry or becoming a household name.
And of course, there are different levels of success. A startup might be considered successful if it's able to achieve any of the above, while others might only feel successful once they've reached a certain level of prominence or scale.
Ultimately, there's no one answer to this question. It depends on the startup, the industry, the market, and a whole host of other factors.
That said, there are a few things that all successful startups have in common. They typically have a strong team with complementary skills, a clear vision for what they want to achieve, and a deep understanding of their target market.
They also tend to be very adaptable, able to pivot quickly when necessary and always willing to experiment. And of course, they usually have a bit of luck on their side as well.
So while there's no surefire formula for success, if you can tick off most of the above boxes, you're probably on the right track.