Drupal is the top open source content management system, that provides a platform for implementing digital innovation and ideas at an extremely fast pace. It is an enterprise ready CMS which has high scalablity and will allow you to scale to any extent. More over security is the first concern that everyone has when it comes to building any application, Drupal is highly secure and the Drupal community makes sure that it adheres to the latest standards for secure application.
Drupal has a global community that make Drupal the best of its kind. The active commnunity contributes lots of features to Drupal, in the form of Drupal Core and contributed modules. Drupal has a modular developement approach, which save a lot of time for the developers from re-inventing the wheel. Most of the common use cases that we come accross in web applications are readily available as contributed modules that can be downloaded from the Drupal Project page and installed, to get the functionality ready in a matter of few clicks. This makes building applications with Drupal extremely fast as you don't end up writing every piece of functionality of you application from scratch.
Speaking about the Drupal User Experience, just like the contributed modules, there are thousands of contributed themes available that can be downloaded for free and you can have your application look extremely user friendly and mobile optimized. Apart from the free themes, paid themes are also available for purchase from different sources. This doesn't limit you to always go with a free theme, or require you to purchase a paid theme. Drupal's theme engine allows you to build your own theme, that matches your branding guidelines and as per your unique user experience requirements.
There is literally no limitation on what, or what size of application you can build using Drupal, ranging from small portfolio websites to heavy E-Commerce websites. It does not restrict you from adding more and more features to your application as your organization's or application's needs increase.
Drupal allows you to build backends for your mobile applications, where it acts as a data store and you can front end Drupal with any mobile or front end technologies, Android, IOS, AngularJs, NodeJs etc. You can also have a web version of your Drupal application and simultaneously expose the data to you mobile application as well as your other web applications that would like to consume you main website's data. Thanks to the Services module that makes this happen, by allowing creation of secure REST API's. Now this can be completely reversed to allow your backend applications to push data to your Drupal application using the REST APIs build using Services module.
Drupal has limitless capabilities that can be leveraged for a successful Digital Transformation, by organizations of any size, from startup to enterpise.