This document summarizes a presentation about extending teams and groups in Microsoft Teams. The presentation covers developing tabs, connectors, bots and compose extensions for Teams. It discusses the development process which includes defining the app manifest, implementing code, testing by packaging and sideloading, and distributing by uploading and enabling in Teams. The presentation demonstrates creating connectors that post to webhooks and use the Outlook connector API. It also demonstrates creating tabs and bots in Teams using the Yo Teams generator. The presentation concludes by discussing opportunities for developer and providing feedback to Microsoft.