SHA3-256 is a cryptographic module for making hash. The algorithm works using a method called the Keccak sponge construction. This method involves two main phases: absorb and squeeze. It takes input data of any size and generates a fixed 256- bit output called a digest. It is a one-way process—once data is hashed, we cannot get back the original data. This makes the algorithm useful for verifying data integrity, creating digital signatures, and ensuring secure storage.