Apps help you find content from your favorite services and share it right in Teams. Here's how:

• Chat with a bot: Bots provide answers, updates, and assistance in a channel. You can chat wit them to get help with task management, scheduling, and more.
• Share content on a tab: Tabs help you share content and functionality from a service in a channel. Connect to services like Excel, SharePoint, or a website of your choice.
• Get updates from a connector: Connectors send updates and information directly to a channel. Get automatic updates from services like RSS feeds and GitHub.
• Add rich content to your messages: These apps find content from different services and send it straight to a message. You can share things like daily information, images, and videos with anyone you're talking to. 
• Get or make an app: Go to the Store to add a bot, tab, connector, or messaging app to Teams.