FPGA stands for Field-Programmable Gate Array, a type of integrated circuit that can be reprogrammed after manufacturing to perform specific hardware functions. Unlike fixed-function chips, FPGAs allow users to define their own digital circuits using hardware description languages. In cybersecurity, FPGAs can be used for hardware acceleration, cryptographic operations, or security research, but they may also introduce risks if malicious configurations are loaded. Their flexibility makes them valuable for prototyping, custom computing tasks, and adapting to evolving security requirements, but proper access control and configuration management are essential to prevent misuse.