# Using Karl the CMS

## SF.gov content management system&#x20;

SF.gov is built using a content management system, or CMS. The CMS for [SF.gov](http://sf.gov) is a custom product called Karl.

Digital Services engineers build and maintain Karl using a product called [Wagtail](https://wagtail.org/).

### What is a CMS?

A CMS is software that organizes pieces of content and lets users arrange it to create a website.&#x20;

Content is pieces of text, pictures, audio, video– basically, all the stuff that’s on your website.&#x20;

The content management system lets you enter that content, save it, arrange it into pages, and finally, publish.

{% hint style="info" %}
Engineers can build a CMS on top of existing software like Drupal, Wordpress, Wagtail, Adobe Experience Manager, and many others. Karl the CMS is built on [Wagtail](https://wagtail.org/).
{% endhint %}
