Keep Josh in the loop ( from west wing)

[english-learner]

(1) Keep Josh in the loop

SAM
Three congressional districts. Dade County.

TOBY
Those seats are gone.

JOSH
Not to mention the fact that it’s wrong.

SAM
Plus that.

JOSH
What about Texas?

SAM
I wouldn’t worry about it.

LEO
Keep Josh in the loop on this throughout the day.

SAM
Me?

LEO
Yeah.

SAM
The thing is, my day is a little tight...


What does " keep somebody in the loop" mean in the context above? I am looking for some help from native speakers. Can you give me some examples on this saying so that I can get a clear picture of it and also know how to use the phrase. Thank you very much!!!

[Marylin]

To keep someone in the loop means to provide them with all the necessary information, keep the person/s up to date/posted with what's going.

Mary is new to this City Council. Please, take care of Mary and make sure you keep her in the loop on the board issues.

The FBI investigation is going very well. We have to stick together and keep piling up the evidence against Mr. X. Please, keep me in the loop on the newest developments in this case.