Continuous Integration and Continuous Delivery (CI/CD) are crucial practices for delivering high-quality software at scale. They streamline development processes, reduce risks, and accelerate time to market. CI/CD best practices include committing code frequently, optimizing pipeline stages, building code artifacts once, automating tests, keeping builds fast and simple, using shared pipelines (DRY), taking a security-first approach, creating test environments on demand, monitoring and measuring your pipeline, involving the whole team in CI/CD implementation, implementing progressive delivery strategies, choosing CI/CD tools with care, and creating a culture of continuous improvement. Adopting these practices helps organizations deliver software more efficiently and reliably.