Datadog Continuous Testing enables developers to run their tests across every stage of development, ensuring that application workflows function as expected. This practice is known as continuous testing and is a key principle of "shift-left testing". By integrating tests with CI/CD pipelines, developers can monitor test results alongside builds and catch issues sooner. Best practices for executing tests include creating reusable tests for environments, streamlining test runs by executing them in parallel, and integrating tests across all development stages. Datadog Continuous Testing supports these best practices with features such as subtests and parallel testing, enabling developers to optimize their workflows and reduce execution times. By implementing continuous testing, developers can ensure that their applications are working as expected for customers and catch issues sooner.