In email marketing, the following data should be regularly backed up:
Subscriber lists: Maintaining up-to-date backups of your subscriber lists ensures you don't lose contact information in case of data loss. Campaign data: This includes performance metrics, open rates, click-through rates, and more, which are crucial for analyzing and optimizing future campaigns. Email templates: Backing up the designs and content of your email templates can save time and effort if you need to recreate them. User preferences: Storing information about user preferences helps in personalizing future email campaigns.