The lampstands are symbols that represent the seven churches. See how you translated this in [Revelation 1:12](../01/12.md). (See: [[rc://en/ta/man/jit/writing-symlanguage]])
Possible meanings are that these "angels" are 1) heavenly angels who protect the seven churches or 2) human messengers to the seven churches, either messengers who went from John to the churches or the leaders of those churches.