This refers to the people of the earth. Alternate translation: "all you people who live on the earth" (See: [[rc://en/ta/man/translate/figs-metonymy]])
The abstract noun "salvation" can be translated using the verb "save." Alternate translation: "announce that he has saved us" or "tell people that he is the one who saves" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])