Implementation of secondary indexes can vary depending on the email marketing platform you are using. However, some common steps include:
Data Collection: Gather as much relevant data as possible about your subscribers. This could include demographics, past engagement, purchase history, etc. Data Segmentation: Use this data to create different segments within your email list. For instance, you could create a segment for users who have not opened an email in the past 30 days. Automation: Set up automated workflows that utilize these segments to send targeted emails. Many platforms offer features like behavioral triggers and dynamic content that can be highly beneficial.