The AES (Advanced Encryption Standard) algorithm is commonly used for encrypting data in modern security protocols. AES is favored due to its strong security, speed, and efficiency in encrypting large amounts of data across various applications, including secure communications and data storage. This symmetric encryption algorithm plays a critical role in securing sensitive information transmitted over the internet, used in standards like HTTPS and VPN services. Its ability to withstand attacks makes AES a preferred choice for organizations aiming to protect their data from unauthorized access.