OT: just googled that name, info panel on the right in my language settings categorizes it as "金融の連鎖", or "cascading of finances". am not sure how to take that.
Pretty good description tbh
Their business model is an online payment provider (like e.g. PayPal/apple pay) that splits the payment into 3, 6 or 12 monthly payments, usually at 0% interest
The idea being that for the business the loss in revenue from an interest free loan is worth it if it causes an increase in sales
Klarna is basically loan sharks but if you do it with an app is legal. Also Opera the browser moved to doing that.