Segmentation involves dividing your email list based on specific criteria. Here are some ways to use demographic data for segmentation: 1. Age: Create segments based on age groups to send age-appropriate content. 2. Gender: Tailor your messaging to be gender-specific if your product or service appeals differently to men and women. 3. Location: Use geographic data to send location-specific offers or updates. 4. Income Level: Segment based on income levels to promote products that match the purchasing power of different groups. 5. Occupation: Tailor your emails to suit the professional interests of your audience.