Android is a recently created mobile Operating System (an Operating System in simple terms is the software that allows phones, tablets, pcs, laptops and other devises to install and run their applications) created by Google (one of the most successful companies in the field of IT).
Creating an Android application for you will allow users to buy or download your applications. This basically means that people that own a Samsung phone/tablet or another device power by Android can get your application by clicking on Google Play/Amazon Store or any other store for mobile devices. Buy having your own application you give your brand competitive advantage and allow the user to have one more way to interact with your business. It is very good for your business and brand to have an application because users spend a lot of time with application and getting applications.