Read this guide if
This guide assumes that you:
Piwik uses two methods to store configuration settings:
These methods are used by Piwik Core and should not be used by plugins. Plugins use a separate method of configuration described here.
INI configuration is explained in the INI configuration guide.
Some Piwik configuration settings are stored as Options. Options are just key value pairs persisted in the database. To learn more about options, read the documentation of the Option class.
To learn about how options are persisted in the MySQL backend, read about the Piwik database schema.