Post your achievements for all to see.
For a regular user, the news app behaves the same as the news section. A news magazine is presented that gives access to multiple news sections and articles.
If you belong to a user group that has more permissions than only reading news, then a sidebar will be visible on the left hand side of the screen that gives access to more features like creating and editing news items.
This is great to decentralise internal marketing a bit. You can let your departments share exciting things right out of their context. No need to excessively draft a news text, pass it to the central communications department and wait for publication. This is a good area where you can streamline processes and improve speed of communication.
Why is that a good thing? First, your intranet becomes much more lively. People post news and others see them right away. People feel informed not only 2 weeks after the event. But also departments get feedback and gain the ability to share success by themselves. This can increase prestige and works similarly to staff awards on a departmental level.
And last but not least the collection of news items outlines the progress and success the company is having and persists that in a central place. It just feels good to see all the things that are going on.