Before you go putting in hair care products or getting treatments at the hair salon, you need to know your hair type. Everyone's hair reacts differently, but there are some broad categories where if you determine your hair fits in, you will have a good idea of what kind of hair care is recommended. You may not necessarily need to use a hair classification system but that is a good place to start.
Where many people get their knowledge is to just find someone that has similar hair and ask them about their care practices. Find out about the curl amount of your hair by taking a shower and letting the scalp air dry naturally without treating it in any way. It could be straight, have a slight wave, spirals, curls, or random zigzags. After hair shape, the next classifier Denver hair stylists use is hair thickness.
You determine hair thickness by taking a single clean strand and holding it up. Thin hair is barely visible. Medium hair can be felt and seen but is soft.