What is Android?
Android is an Open Source operating system for mobile and entertainment devices such as smartphones, tablets, and televisions. It is developed by a consortium of developers known as the Open Handset Alliance.
Android has a customisable open architecture, this means that developers can create applications for Android and distribute them through the Google Play store or other channels.
In this moment Android is the most used mobile OS with more than 70% of mobile market share1.
1 statcounter.com - Mobile Operating System Market Share Worldwide