How does Facebook operate as a monopoly? What government interventions, if any, need to be taken in order to regulate the social media app?

Anything about how Facebook operates as a monopoly, how it generates income through advertising and how it sets prices for advertisement slots.

Why should the government intervene, and how have they done so in the past with other monopolies?

How to sufficiently tie in the aspect of their revenue with their use of information and personal data of subscribers?