This is the 16934th most frequent Russian word.
сообщаем
"Сообщаем" means "we inform" or "we report."
The word 'сообщаем' here is used in the present tense to indicate the act of informing someone at the moment of speaking.
Мы сообщаем вам важные новости.
We are informing you of important news.
In this sentence, 'сообщали' is the past tense of 'сообщаем', describing the act of providing information that occurred in the past.
Её родители сообщали ей о переезде.
Her parents informed her about the move.
Here 'сообщите' is the imperative form, used for giving instructions or commands to others on informing in case of an event.