Ubuntu is commercially sponsored linux based operating system. This enables all your programs and managing your hardware.
Other examples of mainstream operating system include Microsoft Windows and Mac OS X.
Ubuntu focuses on usability or ease of use and maintains a regular six-month update cycle with an ongoing commitment to supporting the community of over 20 million users. This is not to say that Ubuntu users need support as the community is highly geared at supporting itself.
Ubuntu is free and it always will be. That’s because it’s the work of open-source software experts from all over the world – people who believe software should be free.