One large study found that meal ... protein (about 25 to 30 grams), 30% healthy fats and 30% low-glycemic carbohydrates and fiber to help you feel full and keep your blood sugar levels stable ...
“Macros” is just a shorthand term for macronutrients: protein, carbohydrates and fats. They’re the nutritional building blocks that all foods are made up of in various ratios.