What are the uses? and where I can use Drupal?
Drupal is the one of the top level open-source content management framework. Drupal have basic and advanced website features by default. Many of the essential website features are in-builded in Drupal CMS and assured security also. While using Drupal no need think much about security. Drupal have strong community, they have regular activity to monitor and update security in Drupal.
Drupal is flexibility and extensible, There is not limitation to use Drupal.