05 Jan What is a node, trigger, and flow in n8n

In n8n, a node is the building block of automation, a trigger is the starting point that initiates a workflow, and a flow (or workflow) is the complete sequence of connected nodes that automate a process.

What is a Node in n8n

• Definition: A node is a single step in an automation workflow. The core of an n8n workflow is the node.
• Function: Each node performs a specific action, such as sending an email, querying a database, or transforming data.
• Types of Nodes:
  • Action Nodes: Execute tasks (e.g., “Send Email”, “HTTP Request”).
  • Trigger Nodes: Start workflows when an event occurs.
  • Utility Nodes: Handle logic, data transformation, or flow control.
• Example: A “Google Sheets” node can add a new row to a spreadsheet.

What is a Trigger in n8n

• Definition: A trigger is a special type of node that starts a workflow when a defined event happens.
• Function: It listens for external events or schedules.
• Common Trigger Types:
  • Webhook Trigger: Starts when data is sent to a webhook URL.
  • Cron Trigger: Starts at scheduled times (like a cron job).
  • App Triggers: Start when something happens in an app (e.g., new email in Gmail, new row in Airtable).
• Example: A “Webhook Trigger” node starts a workflow when a form submission is received.

What is a Flow (Workflow) in n8n

• Definition: A flow (often called a workflow in n8n) is the complete automation pipeline made up of nodes connected together.
• Function: It defines how data moves from one node to another, and how tasks are executed in sequence or parallel.
• Characteristics:
  • Visual drag-and-drop interface.
  • Can branch into multiple paths with conditional logic.
  • Reusable and shareable across projects.
• Example: A workflow that:
  1. Starts with a Webhook Trigger (form submission).
  2. Passes data to a Google Sheets Node (store response).
  3. Sends a confirmation email via a Gmail Node.

Comparison

n8n Workflow example

Let us see a simple n8n workflow diagram (e.g., Webhook → Google Sheets → Gmail) to visualize how nodes, triggers, and flows connect:

It shows a simple n8n workflow where:

• A Webhook Trigger node starts the flow when data is received.
• That data is passed into a Google Sheets node to store it.
• Finally, a Gmail node sends out a confirmation email.

This makes it easy to see how nodes connect, how a trigger initiates the process, and how the entire flow automates the task end-to-end.

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