Find official and third party extensions and themes and install them with one click.
The Marketplace is divided into a section for extensions and one for themes. You can navigate between those using the tabs at the top of the interface.
When clicking on the preview of each extension or theme a modal window will open that contains further information on the product. Just hit the Install button in the upper right corner.
When the installation has finished, you will see an Enable button to activate the extension or theme right away. If you want to disable and enable packages lateron, navigate to System > Extensions or System > Themes where you can see all items currently installed in your system.