This option is only available for mobile apps. If you have a web application, then you need to create a website.
1.- This shows you the name of your app.
2.- This shows you the theme that your app has.
3.- This is the version of the current demo.
4.- This is de URL where your demo is uploaded, to open it just click the link, otherwise copy and paste it in a web browser.
5.- Click to build or update the demo if made some changes to the app.
Glad we can help!
Have a nice Ordering