The term "Microsoft Office" generally refers to Word, Excel, PowerPoint, and other apps in the Office suite, but there's also a unified "Office" app used for organization and managing other apps. Microsoft just announced that the Office app and website will have a new name and logo.
Microsoft revealed in a support article that Office.com, the Office mobile app on Android and iPhone/iPad, and the Office app for Windows will have a new name: Microsoft 365. There will also be a new icon, seen above, a hexagon with blue and purple colors. The company says you won't have to do anything to maintain access to your apps and features, and the standalone apps on desktop (like Word and Excel) aren't affected at all.
The Office app on Windows and Office.com have mostly served as a simple portal to your recent documents, while the mobile version is the main way to use Word, Excel, and PowerPoint -- those apps are still available separately, but the Office app packs them into one single download. Microsoft says more features are coming to the desktop and web apps, including a dashboard for subscription information and storage usage, more templates, and better sorting. Word, Excel, and other apps will still be separate on desktop.
The name and logo comes after Microsoft changed "Office 365" to "Microsoft 365" back in 2020, since the subscription service now includes apps and services that don't have anything to do with the long-running Office suite, such as Microsoft Editor. The app now fits the name of the subscription service, which should mean less confusion -- after the confusing rebranding process is over, anyway.
Source: Microsoft