"Who dares wins" means that if you are brave enough to take a risk, you have a better chance of achieving success than if you play it safe all the time.
Imagine you really want to climb to the top of the big slide at the playground. You might be scared because it's so high up, but if you dare to climb all the way to the top, you will be rewarded with an exciting ride down that will make you feel really proud of yourself. That's the "who dares wins" attitude - taking on challenges and risks, even if it's scary, can lead to great rewards.
But it's important to always remember to be safe and careful when daring to do something. If you want to climb that big slide, make sure you wear shoes with good grip and ask someone to help you climb up. And remember, even if you don't make it to the top every time, the important thing is that you tried and you were brave enough to take a risk. That's what "who dares wins" is all about!