I have been working through the following link:
https://msdn.microsoft.com/en-us/library/office/dn574752.aspx
I get to point 2. "In the left task pane, choose add-ins'
But in my sharepoint online admin I do not have this option.
From Office 365 I click Admin and go in to the Office 365 admin center. Then down the left is the Admin section with Exchange, Skype, SharePoint, Compliance etc. I click on SharePoint.
Then the options are Site collections, InfoPath, user profiles, bcs, term store, records management, search, secure store, apps, settings, configure hybrid. There is no option called 'Add-in'.
I thought maybe the apps option might work / be the same thing. Any ideas?