The concept of "shift left" in software development refers to identifying and fixing defects as early as possible in the development process, shifting quality assurance activities earlier in the process. This approach has been beneficial for decades, with a recent expansion of focus to include tools that help identify issues on the right-hand side of the deployment lifecycle. The tools mentioned, such as SonarLint, SonarQube, and SonarCloud, can detect bugs, code smells, and vulnerabilities before they get into production, reducing costs, improving software quality, increasing speed of development, and reducing risks associated with software failures. The shift to "shift right" involves testing the code of infrastructure, such as Kubernetes templates and Docker configuration, to detect bugs and vulnerabilities in the resulting software, ensuring security best practices and regulatory requirements are met. This can be achieved through tools like SonarLint and SonarQube, which identify issues such as secrets detection and platform configuration problems that wouldn't have a significant impact during local development.