Contributed to the zephyrproject-rtos/zephyr repository by developing comprehensive documentation for the PM Latency Sample, focusing on clarifying power state exit latencies and providing detailed usage guidance. Leveraged expertise in Zephyr OS, embedded systems, and reStructuredText to create a standards-aligned README that supports developer onboarding and performance testing. The documentation outlined requirements, sample output, and practical instructions, ensuring consistency with existing Zephyr sample documentation standards. By incorporating review feedback and maintaining version control, the work enhanced self-service learning and reduced support needs. This contribution improved the accessibility and quality of performance tooling documentation for embedded systems developers.