Strangers in the ordinary sense: people you don’t know, online at the same time as you. They live in different countries and speak different languages, and looking through Who’s online by language helps when you want someone you can follow without effort.
A call here doesn’t come with a script. One person wants five minutes of company on a slow evening, the next is practising English, the one after that is just curious who’s out there. You’ll get further by saying something real early on than by asking where they’re from and waiting.
For the matching side of things, the guide on how to call a stranger follows a single call from the first ring to ringing back.
Most of them are on phones, propped against a mug or a pillow, which is why the first second of a call so often shows a ceiling.
Starting as a guest doesn’t make you invisible to them, though; what they can see, and what to keep out of shot, is set out under staying safe on PandaChat.