Securing sensitive information in microservices architectures is a significant challenge due to the increased volume of secrets such as passwords, API keys, and certificates that need protection across distributed services. Effective secrets management is crucial to safeguarding these credentials while ensuring authorized access. The article discusses common anti-patterns like hardcoding secrets and using environment variables, which pose security risks. It emphasizes core principles such as adopting a zero trust model, using dynamic secrets, and centralizing management with distributed access. Various architectural patterns and technologies, such as secrets management platforms (e.g., HashiCorp Vault, AWS Secrets Manager), the sidecar pattern, and infrastructure integration, are recommended for robust secrets management. Automated rotation and auditing are vital for maintaining security, while CI/CD pipelines require secure handling of credentials. The article concludes that effective secrets management integrates with DevOps practices to balance security and agility, with platform engineering teams playing a pivotal role in providing standardized solutions.