Segmenting an email list helps you target the right audience. You should divide your list based on key factors. Age is one factor you can use. Location is another. You can also segment by interests or purchase behavior. Segmenting by activity is helpful too. You can group people who open emails frequently and those who rarely do. You can also use the data you collect to create customized content. Customizing messages will make your emails more relevant. You can improve your email performance by sending the right message to the right person. Segmentation allows you to increase your engagement rates.