https://vr.google.com/tourcreator/

Example: https://poly.google.com/u/1/view/7rfKK4–oKN

example small business promotion: https://poly.google.com/view/5vVMdnSRzVS

https://poly.google.com/u/1/view/2yTR4KVvd-0

http://www.freetech4teachers.com/2018/05/how-to-add-points-of-interest-to.html

http://www.marzipano.net/tool/index.html