What does Revelation 2:13 mean?

I know where you live—it’s where Satan has his throne. But you hold on to me and didn’t deny your faith in me, even when Antipas, my faithful witness, was killed among you, right where Satan lives. Revelation 2:13 - Modern Text Bible

(He acknowledges that they live in a place full of evil influence, but they’ve stayed loyal, even when one of their own was killed for his faith.)