INI files are INItialization files for applications. They contain various settings that will be read by the application when it first starts up. These settings are represented by "keys" and "values" and are organized into "sections" like so:
[Section1] Key1=Value1 Key2=Value2 [Section2] Key1=Value1
Of course, all of the names above can be replaced with more descriptive ones, so the text is more human-readable.
With ASSS all settings are stored in configuration files (.conf) that (mostly) have the same format as the INI files. The primary one is global.conf, which contains all of the important settings.