A Key Management Service (KMS) improves data security compared to traditional methods by offering several advanced features. Traditional methods often involve manual key management practices that can be prone to errors and inefficiencies. KMS automates key generation, storage, rotation, and deletion, reducing the risk of human error. It also provides centralized control and visibility over all encryption keys, enhancing monitoring and auditing capabilities. Additionally, KMS employs strong encryption standards and integrates with various security policies and access controls to protect keys from unauthorized access. This centralized approach ensures that keys are managed consistently and securely, which is crucial for maintaining data confidentiality and integrity. Overall, KMS provides a more robust and streamlined solution for managing cryptographic keys compared to traditional methods.