The db editor would provide a user interface to access and modify the game's database. This could involve connecting to the game, selecting specific data sets (e.g., players, teams), and then making changes.
The is a specialized community-driven tool and a series of "Repack" database updates used to modify and modernize the legacy FIFA 16 Mobile game. Because EA Sports discontinued official support and servers for FIFA 16 Mobile years ago, the community uses these editors and repacked databases to keep the game current with modern rosters, kits, and players. Core Functionality of the DB Editor db editor fifa 16 mobile repack