What does Revelation 1:20 mean?

Here’s the secret meaning of the seven stars you saw in my right hand and the seven gold lampstands: The seven stars are the messengers of the seven churches, and the seven lampstands are the seven churches themselves. Revelation 1:20 - Modern Text Bible

(Jesus explains the symbols: the stars represent the churches’ messengers (or leaders), and the lampstands are the churches themselves.)