Flag output marks a task as complete or ready for the next step without stopping the entire workflow

Flag output in Google Flow is a setting that tells the workflow "this task is done, move on to what comes next." When you turn on flag output for a task, Google Flow marks that task as finished and passes control to the next task in your sequence. Without it, a task might wait indefinitely or require manual intervention before the workflow can continue.

Think of it like a relay race: one runner finishes their leg, passes the baton (flag output), and the next runner takes off. If the first runner never passes the baton, the second runner never starts, and the whole race stalls.

Key Takeaways

  • Flag output tells Google Flow that a task is complete and the workflow should move to the next step automatically.
  • Without flag output enabled, a task may pause the entire workflow until someone manually confirms it is done.
  • You typically enable flag output on tasks that have a clear end point, like sending an email or updating a spreadsheet.
  • Some tasks, like waiting for human approval, should not have flag output turned on because they need a person to decide what happens next.

How flag output works in your workflow sequence

Google Flow executes tasks in order. When a task completes—say, it sends an email or writes data to a sheet—the workflow needs to know whether to move forward automatically or pause and wait. Flag output is the signal that says "I am finished, proceed."

If you have a three-step workflow (fetch data → send notification → log result), flag output on the first task tells Flow to move to the second task as soon as the data is fetched. Flag output on the second task tells Flow to move to the third task as soon as the notification is sent. Without flag output on any of these steps, the workflow stops after each one and waits for a manual signal to continue.

This matters because some tasks take time to complete, and you do not want your entire workflow blocked while waiting. Flag output lets you chain tasks together so they run in sequence without human intervention at each step.

When to turn flag output on

Enable flag output on tasks that have a definite completion state and do not require human judgment. Sending an email, updating a row in a spreadsheet, creating a calendar event, or posting a message to Slack are all good candidates. These tasks finish, and the next step can begin when ready.

Flag output works well when the task outcome is binary: it either succeeded or failed. If it succeeded, the workflow moves forward. If it failed, Google Flow can be set to retry, skip, or stop the entire workflow depending on how you configured error handling.

Use flag output on any task where you want the workflow to be fully automated. If you are building a workflow that runs without human involvement—like syncing data between two apps every morning—flag output on each step keeps everything moving.

When to leave flag output off

Do not enable flag output on tasks that require human decision-making. If a task is asking a person to review something, approve a request, or choose between options, flag output should be off. The workflow should pause and wait for that person to take action.

Similarly, if a task is waiting for an external event—like a file to arrive in a folder, or a form to be submitted—flag output should be off. The workflow needs to stay paused until that event happens, not move forward automatically.

If you turn on flag output for a task that should not have it, the workflow will skip past the approval or wait step and proceed as if the decision was already made. This can cause your workflow to do things you did not intend.

How flag output affects error handling

When flag output is on and a task fails, Google Flow stops the entire workflow by default. This prevents downstream tasks from running with incomplete or incorrect data. You can configure what happens on failure—retry the task, skip it, or send an alert—but the workflow will not move forward until the failure is resolved or you tell it to skip the task.

If flag output is off, a task failure does not automatically stop the workflow. Instead, the workflow pauses at that task and waits for manual intervention. Someone has to go in and either fix the problem or tell Flow to move on.

For automated workflows, having flag output on means you can set up automatic retries: if the task fails the first time, Flow tries again after a delay. This is useful for tasks that might fail temporarily, like sending an email to a server that is briefly down.

Common mistakes with flag output

The most common mistake is turning flag output on for a task that should wait for human input. A workflow that approves a purchase order, for example, should pause at the approval step and wait for a manager to review it. If you enable flag output on that approval task, the workflow will skip the approval and proceed as if it was already done.

Another mistake is not enabling flag output on tasks that should run automatically. If you build a workflow to sync data between two apps every hour, and you leave flag output off on the sync task, the workflow will complete the sync and then pause, waiting for manual confirmation before moving to the next step. This defeats the purpose of automation.

A third mistake is not understanding that flag output only controls whether the workflow moves to the next task. It does not control whether the task itself runs. If a task is set to run on a schedule or triggered by an event, it will run regardless of flag output. Flag output only determines what happens after the task finishes.

Setting up flag output in your workflow

In Google Flow, flag output is usually a toggle or checkbox in the task settings. Open the task you want to configure, look for an option labeled "flag output," "mark complete," or "proceed automatically," and turn it on or off depending on whether you want the workflow to move forward automatically.

After you enable or disable flag output, test the workflow by running it manually or waiting for it to trigger. Watch what happens at each step: does the workflow pause where you expect it to, or does it move forward when you thought it would wait? Adjust flag output settings until the workflow behaves the way you intended.

If your workflow has multiple branches—some tasks that should run in parallel, others that should run in sequence—flag output on the sequential tasks keeps them in order, while leaving it off on tasks that need human input ensures the workflow pauses for decisions.

Frequently Asked Questions

What happens if I turn flag output on for a task that fails?

The workflow stops and does not move to the next task. Google Flow will either retry the failed task automatically (if you set that up), skip it, or alert you to the failure. The workflow will not proceed until the failure is resolved or you manually tell it to move on.

Can I turn flag output on and off for the same task in different workflows?

Yes. Flag output is a setting within each individual workflow, so the same task can have flag output on in one workflow and off in another. This lets you reuse tasks in different contexts depending on whether you need the workflow to pause or proceed automatically.

Does flag output mean the task runs faster?

No. Flag output does not change how long a task takes to complete. It only controls what happens after the task finishes. A task that takes 30 seconds will take 30 seconds whether flag output is on or off. Flag output just determines whether the workflow waits or moves forward once those 30 seconds are done.

What if I want a task to run, but I do not want the workflow to move forward until I manually approve it?

Turn flag output off on that task. The task will run and complete, but the workflow will pause and wait for you to manually signal that it should move to the next step. This is the standard setup for approval workflows.