The Event log module stores information about all events that occur in the system. A log of these events can then be displayed and inspected. It is useful in case that some unwanted behavior occurs in the system and you want to find out where the problem originates or some other details about it.
The event log can be viewed in the Administration -> Event log section of both CMS Desk and Site Manager. In CMS Desk, only events related to the currently edited website can be viewed, while in Site Manager, you can view all events that occurred in the whole system. More details about these interfaces can be found in the Viewing logged events topic. Access to the interfaces and actions performed there can be restricted by means of permissions. To learn more, please see the Security topic.
In the Event log internals and API sub-chapter, you can find information about database tables and classes that are used for event logging, as well as several examples of how events can be logged and how the log can be managed using Kentico CMS API.