Why are there billions of thunderstorms in the sky every year?

Thunderstorm is a strong convective weather phenomenon. You know, the atmosphere is changeable. Due to the different climate and atmospheric flow around the world, strong convective conditions often form, which will lead to thunderstorms. In tropical areas, thunderstorms occur almost every day because of strong convection, and the probability of thunderstorms is even greater. So there are many thunderstorms every year.