Difference between O-365 & SharePoint online:
This is a common question most of the Techie’s confuse about.
I am trying to explain in a very simple manner.
Office 365: Is a cloud offering set
of different Microsoft products like, SharePoint, Exchange, MS Office, Power BI,
Power Apps, Power Automate, Teams, One drive and many more in one place.
SharePoint
Online: Is a cloud offering the functionalities of SharePoint and Related.
So you can think of office 365 as larger set, with SharePoint being a subset.