Different customer groups have different needs, so sending the same message to everyone may not work well. You can group subscribers based on things like past purchases, interests, or how active they are. For example, new subscribers can get an introduction series, while loyal buyers receive early access to offers. People who have not opened emails for a while may get a gentle reminder with something helpful. This approach makes each person feel the message was meant for them. It also improves results because the content is more relevant. How do you like to segment your email list?