Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
When you said Android device, specifically what is it?
if it’s a phone or tablet, if the screen is less than 11 inches you can install it for free from google play.
if the screen is bigger than that you need a subscription. You can still install from google play but you need to sign in with an account that has a subscription like personal or family.
if it’s a Chromebook it’s not supported. You can only use the web version via www.office.com.