What is game distribution and what is the mobile game distribution system for?

Simply put, it is the intermediate link to meet the players after the game is developed. Game publishers distribute games to major app stores, and then players download them.

Security risks:

Not a host developer, nor a subsidiary of a host developer or a developer of a production team. The second party is not commonly used, and basically refers to the studio that develops games for host developers. Because these studios do not have the strength and right to distribute games, they can only be distributed by host developers.