Introducing a new phrase via my brother "digital feudalism" -- this is the use of technological power to control platforms and flows of information.
For example, if everyone is using your social media app to get news (and most people now get their news on social media) you could throttle news that is harmful to you and promote news that helps your political goals.
This could, in theory, be done in ways that would be hard to prove that is happening, although currently it's out in the open.