The first order proves the storefront works. The second order proves the relationship does. The difference is usually how well you follow up inside the chat your customer already uses.
Follow up while the order is fresh
A short delivery confirmation or a question about how the product worked lands well in the days after an order, while the customer still remembers buying.
Give a reason to come back
Restock alerts, a new-arrival note, or a small returning-customer offer gives people a reason to open your chat again without feeling pushed.
Keep it consented and calm
Only message customers who opted in, keep the value obvious, and let people reply. Engagement that respects the conversation keeps the channel healthy.