Calls to action (CTAs) are important but they don't need to be perfect.
Start with something basic and then work to improve it as you go.
The simplest one is to just describe how your product helps your customer. For example:
Repeat Customer Insights helps you better understand your customer behavior so you can better market to them.
See? Simple can be effective.
Eric Davis
Is one flavor better at keeping customers?
Compare how your variants perform to find the ones that keep customers buying over and over again.