Well, good question. Quantum computing is the use of Quantum characteristics in order to make computations.
What are Quantum characteristics you might ask. Well, I’m sure you have already heard about Entanglement and Superposition, which I will explain later. But what really matters to me, as a software developer, is the fact that Quantums can hold more than 2 states in one bit. It means much more computing power comparing to the “classic” computers with the same number of bits.