This is anything that benefits from directions.  Such as, how to use inform your doctor about trying a new lifestyle change, how to monitor your health changes, especially if you’re on medicaiton, how to use a glucometer, measure waist to hip ratio, keep from crying when slicing onions, how to use a gram scale to calculate your own recipe and food input, how to use my favorite “nutrients” calculator, How to read a “Food Fact” label, the “Ingredients” labels, and . . . oh, there will be others!