Drinking enough water can have numerous benefits.
One important factor, is that it can help boost the amount of calories you burn.
According to 2 studies, it can boost metabolism by 24-30% over a period of 1-1.5 hours. This can amount to 96 additional calories burned if you drink 2 liters (67oz) of water per day.
The best time to drink water is half an hour before meals. One study showed that half a liter of water, 30 minutes before each meal, increased weight loss by 44%.