Macronutrients are not necessarily more important than other nutrients in general, but they are more directly related to how your body weight changes than micronutrients. The reason that people tend to track them is because they are the nutrients that have calories. By tracking your macros, you are essentially tracking your calorie intake. However, tracking macros directly allows for people to ensure they are hitting their protein goal, find a range of carbohydrates that keeps their energy up, find out what keeps them full, etc. If you are interested in reading more, we have a blog post all about
why tracking macros works.