This lesson is about how to track biometrics and exercise. These may or may not be applicable. It just depends on your goals and what is a priority for you to track. You may not track weight for weight loss, but sharp daily fluctuations in weight can be related to stress and Inflammation.
You may not be a diabetic, but blood sugar surging can be related to the stress hormone cortisol or even changes in progesterone and the menstrual cycle. It just depends on your goals and what you want to track, but these can be useful features to establish patterns based on specific interventions.