The Advanced Encryption Standard (AES) algorithm is a symmetric block encryption technique that is extensively utilised across the globe. This technique, which has its unique structure for encrypting and decrypting sensitive data, is used in hardware and software all around the globe. When using the AES method to encrypt data, it is exceedingly difficult for hackers to decrypt the data. There is no indication to date that this algorithm is broken. AES can handle three alternative key sizes: 128, 192, and 256 bits, with each of these cyphers having a 128 bit block size. This article will provide an overview of the AES algorithm, describe some key aspects in depth, and demonstrate some prior research on it by comparing it to other algorithms such as DES, 3DES, and Blowfish, among others.