Google Chat is a communication software developed by Google built for teams that provides direct messages and team chat rooms, along with a group messaging function that allows Google Drive content sharing.
Stamp each creative handoff thread with the revision shared.
Your review threads show the revision your teammate shared with a reviewer, even after newer proofs appear.
Share finished creative files with the team and confirm posting.
Your team gets the file in the named channel with the requester's note. The requester gets a link or a clear reason it could not be shared.