Every request your browser sends travels to a server and back, and the time that takes depends far more on distance and routing than on the speed of your plan. Connect to a server on the other side of the world and even a fast line feels sluggish. Connect to one nearby and pages, calls and games respond almost as they would without a VPN at all.

Hong Kong has been a hub for this traffic for decades. Several major submarine cable systems land on its shores, and the Hong Kong Internet Exchange, founded in 1995, lets networks swap traffic locally instead of sending it on a long detour. Data centres for banks, cloud providers and game publishers cluster in the city for the same reason.

For people elsewhere in East and Southeast Asia, a Hong Kong server is therefore often one of the quickest options available, which matters for video calls, online games and anything that reacts to every click.

The second reason is the address itself. Hong Kong services, from local TV platforms to shops, booking sites and some banking and payment apps, are built around Hong Kong customers. Residents who travel often find that some of them behave differently when they log in from abroad, and a connection from Hong Kong is the one they recognise. Anyone who checks their IP address after connecting will see it located in the city.

Then there is the everyday case. Hong Kong is one of the most connected places on earth, and much of that connectivity is free public Wi-Fi in MTR stations, malls and coffee shops, shared by strangers. Encryption keeps what you do on it private.