A cookie consent banner is a legal requirement in some places and optional in others, yet most sites show the same one to every visitor on the planet. The EU and UK want opt-in before any non-essential cookie fires. The US wants notice and an opt-out, not a wall. A lot of traffic needs no banner at all.
This is a guide to detecting a visitor's jurisdiction from their IP and showing the consent experience that actually applies: a strict opt-in banner for Europe, an opt-out notice for US states, nothing where it isn't required. It is not legal advice. It is the engineering around a line your lawyer should draw.
TL;DR
The EEA and the UK require opt-in consent before non-essential cookies run. The US requires notice and an opt-out. Much of the rest of the world requires neither.
One IP field, is_eu, does most of the routing. It covers EU member states only, so add the UK and the EEA states (Iceland, Liechtenstein, Norway) yourself.
