Macros is simply a short form for the 3 "macronutrients" in our diets that provide us with calories (energy): carbohydrates, fats, and protein. It is important to know what your macro ratio is in a day as it can be a huge tool in losing body fat and building a lean and healthy body.
Don't run away screaming! I'm going to help you how to figure out what you need. We need to start by figuring out your BMR.
The first step of meal planning is to determine basal metabolic rate