# Common

The **Common** section of Node-RED's default palette. Each page opens with why you
would reach for that node, then mirrors the node's built-in help.

- [Inject](/docs/node-red/core-nodes/common/inject/): Guide on the Node-RED core node that injects a message into a flow
- [Debug](/docs/node-red/core-nodes/common/debug/)
- [Complete](/docs/node-red/core-nodes/common/complete/)
- [Catch](/docs/node-red/core-nodes/common/catch/)
- [Status](/docs/node-red/core-nodes/common/status/)
- [Link](/docs/node-red/core-nodes/common/link/)
- [Comment](/docs/node-red/core-nodes/common/comment/)
- [Unknown](/docs/node-red/core-nodes/common/unknown/)