TL;DR:
When you view the profile card of a colleague you collaborate with, you will see a new highlight type. These key document updates will include edits, comments, mentions, replies, and shares. Due early to late August 2023.

Details:
With this update, document updates will start to show up when you look at the profile card of your key collaborators, an example of which is below:

Microsoft: “User A would view User B’s profile card and would see that User B has commented on a document User A and User B have access to. User C would not be able to see this on User B’s profile card if they are not a key collaborator”.


Availability:
Due early to late August 2023.

Source, related links, and references:
MC628160.
Microsoft 365 Roadmap ID: 145799.
This file-based experience is powered by Item insights, learn more: https://learn.microsoft.com/en-gb/graph/item-insights-overview.

Page originally published:
8th July 2023 and kept up to date.

For the admins:
If you want to make the content and activities of your organization less discoverable, you can disable item insights: https://learn.microsoft.com/en-gb/graph/insights-customize-item-insights-privacy