# Data

*This section focuses on how to create data using the Umbraco backoffice.*

There are three kinds of content in Umbraco:

* Your normal website content exists in the content section.
* Media content such as images, videos, and PDFs are stored in the Media section.
* Finally, Members, are used for user profiles and frontend authentication which you can find in the Members section.

A fundamental principle in Umbraco is that all content types have a definition (Document Types, Media Types, Member Types). These definitions are highly customizable, meaning you can add properties and have complete control over how the data is organized.

## [Defining Content](https://docs.umbraco.com/umbraco-cms/fundamentals/data/defining-content)

Defining Document Types, adding properties, and creating content.

## [Creating Media](https://docs.umbraco.com/umbraco-cms/fundamentals/data/creating-media)

Defining Media Types and uploading files to the media section, using upload fields and image cropper.

## [Creating Members](https://docs.umbraco.com/umbraco-cms/fundamentals/data/members)

Defining Member Types and creating members for authentication and user profiles.

## [Customizing Data Types](https://docs.umbraco.com/umbraco-cms/fundamentals/data/data-types)

Creating and editing Data Types.

## [Scheduled Publishing](https://docs.umbraco.com/umbraco-cms/fundamentals/data/scheduled-publishing)

Schedule when content should be published / unpublished automatically.

## [Adding Tabs](https://docs.umbraco.com/umbraco-cms/fundamentals/data/adding-tabs)

Overview of how to add and reorder tabs, convert a group to a tab, and manage the “Generic” tab

## [Users](https://docs.umbraco.com/umbraco-cms/fundamentals/data/users)

Control who has access to the Umbraco backoffice and what permissions they have.

## [Relations](https://docs.umbraco.com/umbraco-cms/fundamentals/data/relations)

An introduction to Relations and Relation Types, creating, and managing relationships between different entities in Umbraco.

## [Dictionary Items](https://docs.umbraco.com/umbraco-cms/fundamentals/data/dictionary-items)

Using Dictionary Items, you can store a value for each language. Dictionary Items have a unique key that is used to fetch the value of the Dictionary Item.

## [Content Version Cleanup](https://docs.umbraco.com/umbraco-cms/fundamentals/data/content-version-cleanup)

How to keep the noise down whilst ensuring your important content versions stick around indefinitely.