Segmentation means splitting a big group of customers into smaller groups that are alike. For example, a snack company might make groups by age (kids, teens, adults), by where people live (city or country), or by hobby (sports lovers). Segments help companies match what they make to what different people like.
After segments exist, companies pick which to serve — this is targeting. A good target is easy to notice, easy to reach, measurable, and able to make money (you can remember this as DAMP). Some businesses sell one product to everyone, some make different items for different groups, and some choose a tiny special group.
Positioning is how a product sits in people’s minds. A company might want you to think its cereal is the healthiest or the yummiest. To show this, they compare price and quality, like a simple map, so shoppers see how a product stands out.