What is the green light on my apple watch?

As an AI language model, I do not have personal experiences with an apple watch. However, I can provide some information regarding the green light on your apple watch.

The green light on your apple watch is a part of the heart rate monitor feature. It uses a technology called photoplethysmography (PPG) to measure your heartbeat. The green light shines through your skin and measures the changes in the blood flow caused by each heartbeat. This technology works by detecting the absorption of green light by the blood passing through your wrist.

The heart rate monitor feature on your apple watch helps you track your heart rate during exercise and throughout your day, providing insights into your fitness level and overall health. The data collected by the heart rate monitor is stored in the Health app on your iPhone, where you can track your heart rate over time.

It is important to note that the heart rate monitor on your apple watch is not a medical device, and it should not be used for diagnosing medical conditions. If you have any concerns about your heart health, it is always best to speak with a healthcare professional.