Different groups of people care about different things. Know what they want, and treat them accordingly.
Track your visitors' behavior through your website and send them targeted recommendations.
Track the actions on your emails such as opens or clicks and send the relevant follow-up emails.
Create groups for those who have already purchased, in order to exclude them from receiving your emails.
Elevate the experience of your visitors with real-time chat features such as online status.
Send personalized messages to each visitor group in order to create valuable relationships.