Customer behavior can be a huge help in understanding your target audience and create efficient marketing campaigns. Do you use it already? If yes, how is it working for you? If not, and you don’t know how to start, here you can find a couple of ideas!
https://ghostwriter.ai/2020/10/05/how-customer-behavior-can-help-marketing-strategies/
Good read, I totally agree with you. For each segment of customers, you should have a particular marketing strategy. I'm making Undersend, which helps you define email communication based on users' behavior.