Jed was asking about which segments in Repeat Customer Insights to focus their effort on 80/20 style.
If it was my store and I could only focus on 20% of customers, I would pick the Loyal and VIP (RF) segments. They are the most loyal customers and would be most responsive to messaging. Some will have purchased recently so you'd need to be mindful of that and not push too hard.
Second place would be the Potential loyal and Promising new segments. Those customers are good customers with the potential to become even better.
Repeat Customer Insights will automatically analyze and create these segments for you using the RFM model. It doesn't require setting up your data parameters or knowing how to configure the model, it's all automatically handled by the algorithm.