Maps look authoritative. They also invent confidence when a Scottish sample contains a handful of wallet orders. Our regional payment mix review only prints a cell when the engagement letter’s volume rule is met.
Practical cuts we see work
England / Scotland / Wales for nationwide catalogues; city clusters for brands with dense urban traffic; shipping destination rather than billing address when the two diverge often.
Captions beat colour scales
A bright cell with “n too low” stamped across it prevents a supplier from quoting a phantom conversion rate in a negotiation.
Tie the cut to a decision
If you will not change checkout prompts by region, skip the geographic review and spend the fee on a cleaner method comparison or a funnel visualisation pack.
Browse the regional review when your catalogue and traffic already justify the split.