Explanation :
Shift-left is an integrated approach to improving the flow, efficiency, and effectiveness of work. It is used to move the delivery of work toward the optimum team or person with the aim of improving lead times, resolution times, customer satisfaction, and efficiency. In development environments, this means moving bug-fixing activities to the frontline of build and test teams earlier in the lifecycle. In support environments, repair or problem-solving activities can be moved from the higher-level technical teams to generalist frontline teams.