In different countries the governments control information in different ways. Technology is crucial for authorities when they decide to block some sites, social media or service.
Digital censorship is used by many countries. The government decided what applications should or should not be available for the citizens.
For example, New York Times application was removed from Chinese app store.
Russia asked to remove LinkedIn application from the country's app stores.
Now we can see that all information is centralized in the hand of a few major giants like Apple and Google. And it is not difficult for authorities to put a pressure on them.
Originally Internet was set up as a decentralized and distributed system but now it could become something quite the opposite - one of the most efficient choke points of communication the world has ever seen.
