FinFETs, or Fin Field-Effect Transistors, are a type of transistor used in modern semiconductor devices. They 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 compared to traditional planar transistors. The unique structure of FinFETs enables them to operate at smaller sizes, making them ideal for advanced microprocessors and integrated circuits. As technology continues to shrink, FinFETs play a crucial role in maintaining efficiency and speed in electronic devices, supporting the ongoing trend of miniaturization in the tech industry.