There are numerous criteria you can use to segment your email list. Here are some of the most common ones:
Demographics: Age, gender, income, education level, etc. Geographics: Location-based segmentation such as country, state, or city. Behavior: Purchase history, email engagement, website activity. Psychographics: Interests, values, lifestyle, personality traits. Firmographics: For B2B, criteria such as company size, industry, job role.