If you want to improve your business ROI, you have to consider how to serve your current customers.
This means you are serving your repeat customers, the customers who are most loyal to your business. Of course, you have to have strategies in place that attract repeat customers. You have to know the insider secrets on how to create repeat customers.
In fact, when you look at repeat customer statistics, the average repeat customer will spend around 60 percent more in months 30 to 36 rather than in their first few months of being a customer.
But how to attract repeat customers? Here's a guide that shows you the 5 insider tips to attracting repeat customers. 
Source: https://www.entrepreneurshipsecret.com/repeat-customers/