Deployment strategies are crucial to maintaining constant uptime and minimizing downtime during application updates or feature additions. Two popular deployment methods are blue-green and canary deployments, each with its own benefits and drawbacks. Blue-green deployment involves operating two parallel instances of an application or service, allowing for easy rollback if needed. Canary deployment releases new features to a small subset of users before rolling them out to the entire user base, enabling real-time testing and monitoring. Depending on the use case, a hybrid approach combining elements of both methods can be employed. Feature flags play an essential role in staging deployments and maintaining control over large-scale rollouts.