A FinFET (Fin Field-Effect Transistor) is a type of transistor used in modern semiconductor devices. Unlike traditional planar transistors, FinFETs have a three-dimensional structure that resembles a fin, allowing for better control of the electrical current. This design helps reduce power consumption and increases performance, making them ideal for smaller, more efficient chips. FinFET technology is crucial for advancing Moore's Law, which predicts the doubling of transistors on a chip approximately every two years. By utilizing this innovative structure, manufacturers can create faster and more energy-efficient processors, essential for powering everything from smartphones to high-performance computers.