# Activate and deactivate dynamic modules

To use a module, you must have activated it first. If you have created a module that does not appear under the *Content* tab, it means that you have not activated the module.

To activate or deactivate a module, perform the following:

1. Click *Administration » Module builder*.
2. Perform one of the following:
   * Click the *Actions* link of the module that you want to activate and click *Activate* or *Deactivate* respectively.
   * Click the module you want to activate and then click *Activate this module* or *Deactivate this module* respectively.

When you activate a module, the module appears under the *Content* tab, together with all of its first level content types – you can use it to create dynamic content items. Sitefinity CMS also adds a new widget group for each module and adds one widget for each content type. You use this widget to display the content items created with this module.\
When you deactivate the module, it is removed from the *Content* tab and from the widgets toolbox.