Content aggregation collects material from several sources into one place so a screen can draw from all of them: a news feed, social posts, an internal announcements system, a product database.
It solves the empty-screen problem cheaply. A network with no dedicated content team can still show something current by aggregating sources that are already maintained elsewhere, which is often the difference between a screen that stays useful and one that shows the same loop for a year.
The caveat is that aggregated content is unreviewed by definition, and the brand attaches to it anyway. A news feed will eventually place a headline about a disaster next to a promotional message, in your reception, under your logo. Category filters help and do not solve it.
Decide the moderation posture before switching a feed on: allow-lists rather than block-lists for anything public-facing, a delay long enough for a human to intervene, and a defined way to kill a source instantly. If nobody owns that during the working day, the feed should not be public-facing.