Fitbit is a company that develops and sells fitness products. They sell wearable tech that can be worn and that record various fitness attributes, which can help people achieve their fitness goals. They specialize in devices that can record physiological measures, like heart rate, as well as recording how much and how far one walks.
Presents Fitbit's server response time over the last 24 hours. Increases in network response time can be an indicator for service outages or down servers. Persistent network outages are a clear sign that Fitbit is down for everyone not just you.