To maintain visibility into serverless environments, define strict rules around function deployment, clear guidelines for removal, and use tags to track individual functions. This helps identify long-term production, experimental, or back-office functions and ensures proper maintenance and deletion. Additionally, monitor for security vulnerabilities using tools like Snyk, which scans individual functions for known vulnerabilities, and enforce limits on resource access to prevent financial exhaustion. Logging is also crucial, with a focus on verbose logging, leveraging cloud logging facilities, and implementing a central management system to enable easy debugging and alerting. By following these practices, serverless developers can increase observability, monitoring, and security for their cloud-based projects.