Microsoft Office has been rebranded as Microsoft 365, and is now a cloud-based subscription service with programs like Word, Excel, and PowerPoint.Serene Lee/SOPA Images/LightRocket via Getty ImagesMicrosoft 365 is a cloud-based software suite with programs like Word, Excel, and PowerPoint.Microsoft 365 was formerly called Microsoft Office, and used to be a one-time purchase.Microsoft 365 has a variety of subscriptions with different costs, but there are also free versions.If you have, at any time in the past few years, worked in an office, gone to school, or generally been alive, you have probably used myriad Microsoft 365 products.