What Is Microsoft 365?
Microsoft 365 is a subscription-based cloud productivity suite developed and maintained by Microsoft. Rather than purchasing software outright and running it from a disc or a one-time download, subscribers pay a recurring fee — monthly or annually — and in return receive continuous access to the latest versions of Microsoft’s core productivity applications, along with a growing set of cloud-based services. At the heart of every Microsoft 365 subscription are the applications you likely already know: Word for document creation, Excel for spreadsheets and data analysis, PowerPoint for presentations, and Outlook for email and calendar management. Alongside these stalwarts, your subscription also unlocks Microsoft Teams for video calls and team messaging, OneDrive for cloud file storage and sync, SharePoint for intranet-style team collaboration, and OneNote for digital note-taking. The result is a tightly integrated ecosystem where your documents, conversations, and data flow seamlessly between apps and devices.Microsoft 365 vs. Microsoft Office
The distinction between Microsoft 365 and the older “Microsoft Office” brand trips up a lot of people, and understandably so — the apps are largely the same. The critical differences lie in how you pay for them and how they’re delivered. Microsoft Office (now discontinued as an active product line for consumers) was a one-time purchase. You bought a boxed copy or a digital license, installed it on a single machine, and used that version indefinitely — but you never received feature updates, only occasional security patches. If Microsoft released a new version of Office, you had to pay again to get it. Microsoft 365, by contrast, is a living subscription. Your apps update automatically throughout the year, meaning you always have access to the latest features, security improvements, and AI enhancements — including Microsoft’s Copilot AI assistant, which is being woven throughout the suite. You also get cloud services like OneDrive storage and Microsoft Teams, which were never part of the traditional Office license. In short: Office was a product you owned; Microsoft 365 is a service you subscribe to.Who Is Microsoft 365 For?
Microsoft 365 is designed to serve a remarkably wide audience, from individual home users to multinational corporations. Microsoft offers distinct plan tiers for each of these groups, so the features and pricing you encounter will vary based on your context.Home Users
Individuals who want access to Word, Excel, PowerPoint, and Outlook on their personal computer, tablet, and phone — plus 1 TB of OneDrive cloud storage for photos, documents, and backups. The Microsoft 365 Personal plan covers one person across up to five devices.
Students
Students and educators at eligible institutions can often access Microsoft 365 for free through Microsoft’s Education program. For everyone else, the standard Personal plan provides everything a student needs for essays, research, and presentations at an affordable price.
Small Businesses
Small businesses benefit from the Business Basic and Business Standard plans, which add professional email hosting, Microsoft Teams for internal communication, SharePoint for shared file storage, and admin controls for managing multiple employee accounts from one portal.
Enterprise Teams
Large organizations rely on Microsoft 365 Business Premium and enterprise-tier plans that layer on advanced security features, compliance tooling, device management through Microsoft Intune, and Microsoft Defender for endpoint protection — all managed at scale.
Core Features at a Glance
Across the Microsoft 365 ecosystem, a handful of capabilities stand out as particularly transformative for day-to-day productivity.What’s Included in Every Plan?
Regardless of which Microsoft 365 plan you choose, the following core applications and services are included as standard:- Microsoft Word — full-featured word processor with templates, track changes, and co-authoring
- Microsoft Excel — spreadsheet application with formulas, pivot tables, and data visualization tools
- Microsoft PowerPoint — presentation software with design templates, animations, and Presenter Coach
- Microsoft Outlook — email client with integrated calendar, contacts, and task management
- Microsoft OneNote — digital notebook for capturing notes, sketches, and web clippings
- Microsoft OneDrive — cloud file storage with automatic sync and version history
- Microsoft Teams — messaging, video calling, and file collaboration platform (included on most plans)
- Office for the Web — browser-based versions of all core apps, accessible without installation
Microsoft 365 requires an active internet connection to activate your subscription and access cloud-based features like OneDrive sync, real-time co-authoring, and Microsoft Teams. However, the core Office desktop applications — Word, Excel, PowerPoint, and Outlook — can also be used fully offline once installed. Any changes you make offline will sync automatically the next time you connect to the internet.