What Is TDEE
TDEE stands for Total Daily Energy Expenditure.
Your TDEE is the total number of calories you burn each day, based on your weight, height, activity level etc.
What Does It Mean
If you are aiming to lose weight, then you need to ensure that you are eating less calories, than you are burning per day.
However, if you are trying to gain weight, then you need to eat more calories than you burn per day.
Finally, if you want to maintain your weight, then the amount of calories you eat or drink should match the amount of calories burned per day.