Bulking means that you’re purposely trying to gain weight (preferably muscle) and are therefore eating at a caloric surplus. Cutting means that you’re purposely trying to lose weight (preferably fat) and are therefore eating at a caloric deficit (and probably doing more cardio). If you do decide to do bulking and cutting, please remember that bulking without cutting is just being FAT and nutritionally lazy. To have the bulking phase help you gain muscle you need to be at a caloric surplus which means you are gaining fat.
