GNOME (GNU Network Object Model Environment) is probably the most used graphical environment in the Linux ecosystem, if only because all major Linux distributions such as Fedora, RHEL, Debian and Ubuntu ship with it as the default desktop. GNOME strives for simplicity and ease of use, and for this reason, not without some criticisms by a part of the Linux community, tends to be less customizable than other desktop environments such as KDE Plasma or XFCE. Instead of using plaintext configuration files, GNOME stores its settings in the dconf database, which can be manipulated using the “dconf-editor” GUI, or from the command line using the “dconf” utility.
Dconf is the low-level configuration system used by the GNOME desktop environment. It is basically a database, where the various configuration are stored as keys together with their values. The keys in the database can be inspected, changed, or dumped with the dconf utility or by using the dconf-editor graphical tool.