Microsoft Teams

Definition

Microsoft Teams is a workplace communication platform combining persistent chat, video conferencing, and file collaboration, built as part of the Microsoft 365 suite. It organizes conversations into teams and channels for structured group communication, supports one-on-one and large-group video calls, and integrates directly with other Microsoft 365 applications such as SharePoint, OneDrive, and Outlook, as well as third-party apps through an extensibility framework.

Overview

Teams exists to consolidate the separate tools organizations previously used for chat, video calls, and document collaboration into one application, reducing the friction of switching between a messaging app, a video conferencing tool, and a file-sharing system for routine work coordination. It was built directly on top of Microsoft's Office 365 infrastructure, so it could integrate immediately with Exchange for calendaring and SharePoint for file storage rather than requiring a wholly separate backend. Mechanically, a Teams workspace is organized into teams (groups of people, often mapping to a department or project) which are subdivided into channels for topic-specific conversation threads; each channel has an associated file storage area actually backed by a SharePoint document library, so files shared in a channel are simultaneously accessible through SharePoint's interface. Video and audio calls use Microsoft's real-time media infrastructure, the same technology stack shared with Skype for Business's successor capabilities, supporting features like screen sharing, breakout rooms, and live captioning. The platform also supports a large app ecosystem, allowing third-party tools and custom bots to be embedded directly into channels or personal tabs through Teams' app framework. Among workplace communication tools, Teams' most direct competitor is Slack, and the two are frequently compared: Slack has historically emphasized a lighter-weight, more casual messaging-first experience with a broader third-party integration marketplace, while Teams leans on its bundling with Microsoft 365 licensing (many organizations already pay for Teams as part of their existing Office subscription) and deeper native integration with Outlook calendaring and SharePoint document storage. Zoom, by comparison, focuses primarily on video conferencing rather than the broader persistent-chat and file-collaboration scope Teams and Slack both cover. In practice, organizations use Teams for day-to-day internal chat, scheduled and ad hoc video meetings, and as the primary interface for collaborating on Word, Excel, and PowerPoint files stored in SharePoint or OneDrive without leaving the chat interface. Teams is also commonly used for large-scale webinars and town halls using its live event and webinar features, and many organizations rely on it as the default meeting tool bundled with their Microsoft 365 subscription. Limitations include that Teams' interface can feel more complex than lighter chat tools due to its many integrated features, and performance can degrade in organizations with very large numbers of teams and channels if governance around creating new teams isn't managed. Because Teams channels map onto SharePoint sites underneath, cleaning up unused teams and channels involves the same SharePoint governance considerations, which can be easy to overlook when teams are created without an active decommissioning process.

Key Features

• Teams and channels structure conversations by group and topic
• Each channel's files are backed by a SharePoint document library
• Video and audio calls support screen sharing and breakout rooms
• Live captioning available during meetings
• App framework embeds third-party tools and custom bots into channels
• Direct integration with Outlook calendaring and SharePoint storage
• Live event and webinar features support large-scale town halls
• Bundled with many existing Microsoft 365 subscriptions

Use Cases

Alternatives

Frequently Asked Questions

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