If you’re new to macros, then this really is going to feel like a foreign concept, but if you’ve done macros and have been through a “cutting” phase (where you’re in a calorie deficit to lose body fat), then this is what comes after you’re done cutting. Reverse dieting is a form of positive metabolic adaptation in which the body responds favorably to increased food intake. Meaning you gradually increase your food intake weekly or bi-weekly to work your way back up to maintenance calories (where you theoretically don’t gain or lose weight - your body reaches homeostasis). This is achieved through controlled tracking of your diet while you steadily increase your macros. The process is meant to allow your body to slowly adapt to increased food intake without gaining excess body fat.