From the Drupal.org website:
Drupal is content management software. It's used to make many of the websites and applications you use every day. Drupal has great standard features, like easy content authoring, reliable performance, and excellent security. But what sets it apart is its flexibility; modularity is one of its core principles. Its tools help you build the versatile, structured content that dynamic web experiences need.
Here at OrbitOwl we have extensive experience with using Drupal. There are many options out there for developing websites, such as the popular WordPress and Joomla, which we've used as well, but Drupal goes beyond these traditional content management systems and is really an incredibly flexible and modular framework for creating sophisticated, secure and highly usable web applications. These are just a few of the reasons it has such a great reputation within government, enterprise, the nonprofit sector and education. Millions of sites rely on it every day to deliver the content and functionality that these organisations provide.
Drupal 8 is the latest and greatest version of Drupal.
We love Drupal and we're confident that you will too!