If you are going to search out the cms for your website, and want to deploy the best cms, than drupal is the best solution for it. "Drupal" has very good percentage(14%) market in the world, as compare to total number of sites using cms. Government website such as "whitehouse.gov" is using drupal as a cms and it shows the power of "Drupal" as most secure and effective cms which is used by the usa government for its website.