Intermittent fasting refers to the time frame within which one eats or avoids food in a day. By so doing, you can schedule your daily meals in order to get the most benefits out of them. It can be an 8-hour window for eating and a 16-hour window for fasting.
Rather than just watching or reducing your calories, it is better to give your body more time to digest food, and this proves to be more effective for weight loss.
The whole aim of this dieting technique is not to drastically change the food that you are eating, but the exact timing of eating them. For a 16:8 fasting-to-eating ratio, you eat your last meal for the day between 6 and 7 p.m., then your first meal for the next day would be at 10 or 11 a.m.