The new technique to solve the problems is quantum computing, which involves the use of the laws of quantum physics that are completely dissimilar to the laws used in normal (classical) computers. The potential possibilities of quantum computers are that they would provide a solution to the problems, e.g., in the fields of finance, designing new materials, and medical research, so much faster than any other computer in current use. The researchers are, however, making good progress to take advantage of the superior hardware and the brainier codes, going by the fact that the field of quantum computers is not complete yet. Quantum can no longer be called a theory since it is soon going to be viable and powerful. In 2019, Google reported having cracked a problem on its quantum computer in 200 s that would require an ordinary supercomputer approximately 10,000 years [3]. The 433-qubit Doppelganger development of more powerful quantum computers, referred to as the so-called Osprey, was released by IBM as evidence of the major progress in development [11]. There are some examples that explain why quantum computers are slightly closer to offering some help in solving some practical problems to contribute to the strengthening of cybersecurity, the development of new medications, and the optimization of complex systems. This chapter shows big ideas that characterize quantum computing. It provides qubits (that can possess more than one value at a certain moment in an effect known as superposition). It can also give entropy and interference that enables the quantum computers to perform complex activities in a more coordinated way. We also compare the work of both classical and quantum computers and give basic comparisons of their capabilities to illustrate various things that have already been accomplished with the quantum computers, like molecule simulation or hard math problems solved. The basics leave the readers prepared to read the upcoming chapters, in which it will be discussed further on how the quantum systems can be built and how they can be implemented in the world. Once the reader gets to the end of this chapter, he/she will have an opportunity to understand why quantum computing is a wonderful and thrilling field of investigation, and that to take advantage of this superb technology, one should be aware of the fundamentals.