These are the core objects you'll find throughout the platform — as part of Web API responses, Slash Command invocations, Message Button actions, and the events flowing through the RTM API & Events API.
| Type | Description |
|---|---|
| channel | A public channel |
| conversation | A channel-like container for a conversation used by the Conversations API |
| event | A wrapper for event types delivered in Events API subscriptions |
| file | A file, snippet or post uploaded to Slack |
| group | A private group |
| im | A direct message channel with a user |
| mpim | A multiparty direct message |
| user | A member in your workspace |
| usergroup | A group of users, such as @marketing-team or @finance |