It's interesting to do if you are curious but I don't think it is required. What I have found actually more useful is to take photos of every single thing I eat and drink for a week.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 180 x 2. Current Deadlift: 230 x 2