Office 365 is a subscription-based service for Microosft Office business productivity software Ie.g., Word, Excel, PowerPoint, ...etc.) and online services
(e.g., Exchange, Sharepoint, ..etc.).
Office 365 plans can inlcude Office software which can run on desktop and mobile devices for both PC and mac.
The benefit of Office 365 is that the subscription includes software updates at no additional cost.
O365 plans can include web-based versions of Office applications and cloud services like Exchange email server, Sharepoint,
Microsoft Teams, and Skype of Business.
Office 365 also includes online cloud storage on Microsoft's OneDrive service.
There are two sets of plans: O365 Business Plans and O365 Enterprise Plans.