You can dial in several things if you know how well you slept:
I can judge how performant I'll be in the gym and fitness competitions - ie, how well I can push myself and recover. I can work out whether what I ate before I slept had an impact (high cards vs low, or if certain foods are a trigger for poor sleep). I can understand if things like meditation, light sources, and noises outside, among others, actually impact me or not. I'm constantly learning something new from it month by month.
I can judge how performant I'll be in the gym and fitness competitions - ie, how well I can push myself and recover. I can work out whether what I ate before I slept had an impact (high cards vs low, or if certain foods are a trigger for poor sleep). I can understand if things like meditation, light sources, and noises outside, among others, actually impact me or not. I'm constantly learning something new from it month by month.