What does ‘browse the internet’ mean?

There’s no web browser on the watch.

If you have cellular you’ll still have internet access. Even with a wifi only model you can still connect to wifi that you’ve already used in the past and get internet.

How would you even navigate it?

Yes, check the siri shortcuts. Without wifi it’s pretty slow, but it works well.

The Apple Watch can’t browse the internet with your iPhone physically with you. Or the web, should you choose to be so pedantic as u/PooleyX (I can be a stickler for accuracy at times, but this one got a bit silly).

With what browser? No, that’s not a use case.