Best Practices for Integrating Test Automation into CI/CD Pipelines

In several projects I’ve observed, teams struggle with ensuring that automated tests run reliably within CI/CD pipelines, especially when dealing with frequent code changes and complex deployments. What are the most effective approaches for integrating automated testing into these pipelines to improve release quality and speed? Which strategies or tools work well for API and web testing while keeping tests maintainable and scalable over time? Any insights or real-world experiences on streamlining test automation in modern development workflows would be greatly appreciated.