It depends what kind of exercise you are doing, and how much food you are eating.
If you perform very heavy movements (like squats) for 3-5 reps and you eat a lot, you will get a lot stronger and gain decent muscle mass in your glutes.
If you perform heavy movements (like squats) for 7-20 reps and you eat a lot, you will get stronger and gain a lot of muscle mass.
If you perform lighter movements at higher reps, you won’t gain as much muscle in that area, and you won’t get that much stronger either. You will increase your muscle endurance, which your muscles won’t get much bigger. But endurance and strength are a scale – if you tip too far in one direction, you somewhat sacrifice your potential for the other one.
Exercise causes some of your excess calories to be stored as muscle. Lack of exercises causes excess calories to be stored as fat.
So, if your goal is to get bigger, eating is really important. That’s how you grow! Your body slowly packs on mass from the food.
Decreasing the size of your muscle usually requires a caloric deficit, and less heavy exercise on that muscle.