Quantum computing represents a major leap in computational power, leveraging principles of quantum mechanics. Unlike classical computers, which use **bits** (0s and 1s), quantum computers use **qubits**, which can represent and process multiple states simultaneously due to **superposition**. **Entanglement** allows qubits to be interconnected, enhancing processing capabilities. This enables quantum computers to solve complex problems much faster, such as **cryptography**, **optimization**, and **simulating molecular structures**. Despite their potential, quantum computers face challenges, including **error rates**, **qubit stability**, and **scalability**. Ongoing research and development aim to address these issues, paving the way for breakthroughs in various fields, from drug discovery to complex system modeling.