SaaS businesses and other digital businesses that track user behavior will benefit the most from behavior-based emails. 

For instance, a task-management platform will use behavior-based emails to guide users to experience value in their product by facilitating the process of creating new projects and tasks.

On the other hand, simpler online businesses that do not need to track user actions might not want to take advantage of behavior emails. If you are a content creator that promotes their course within a fixed timeframe might simply want to send one-time broadcasts or a series of time-based emails before the course launch. 

If you run a SaaS platform, you must implement behavior emails to improve your onboarding experience and increase the engagement of new users.