Shift Left Testing is a strategy to enhance efficiency in Agile and DevOps environments by shifting testing tasks earlier in the software development lifecycle (SDLC). This approach reduces costs associated with fixing bugs, as it's less expensive to identify and address issues early on. While beneficial for many organizations, Shift Left Testing may not be ideal for all due to factors such as limited resources or highly regulated industries. Implementation of this strategy involves including developers in testing activities, integrating testing in the early development stage, and adopting continuous automation in the organization.