Android comes in many flavors and styles, but Cyanogen OS is a little different from the rest.
We all know that Android is made by Google, but it's not quite as simple as that. Each of the major smartphone manufacturers have their own fork of Android, complete with features and user interfaces unique to the devices they manufacture and sell. Google works with these manufacturers and ties all of these forks together with Google Play Services, which makes the devices you use today run apps in mostly the same way.
Then there's Cyanogen OS. It's not always easy to describe where this version of Android fits into the ecosystem, but to help simplify things we've put together this introduction to the things that make this flavor unique.