how to use asset bundle

Can someone direct me please to how to use asset bundle. i have read the documentation but totally confused. I want to be able to build all of my 25+scenes and my target platfomr is android. i have to run my project on my vr device, i do not plan to post it in playstore or anywhere else.just need it for my organisation.
How do I add all the scenes to the asset bundle and them build them to create the apk file? i am totally clueless. please help.

download this ,put your scenes and build asset bundle in android.